REQUEST FOR QUOTATION (“RFQ”) No. PS20130914 FLOOD … · 2013. 9. 26. · REQUEST FOR QUOTATION No. PS20130914 FLOOD-RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE INSTRUCTIONS TO

REQUEST FOR QUOTATION (“RFQ”) No. PS20130914

FLOOD-RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE

Quotations are to be addressed to the Purchasing Services Office, City of Vancouver, 453 West 12th Avenue, Vancouver, British Columbia, Canada, V5Y 1V4, (Courier Delivery and Drop off is at the Information Desk, Main Floor Rotunda of the same address) prior to the Closing Time: 3:00 pm Vancouver Time (as defined in Note 2 below), Thursday, October 10, 2013.

This quotation will not be opened publicly.

NOTES:

1. Quotations are to be submitted in sealed envelopes or packages marked with the Vendor’s Name, the RFQ Title and Number.

2. Closing Time and Vancouver Time will be conclusively deemed to be the time shown on the Main Floor Rotunda Information Desk computer clock.

3. The City of Vancouver City Hall is open on Business Days 8:30 am to 4:30 pm Vancouver time and closed Saturdays, Sundays and holidays.

4. Reponses to be submitted: One (1) hard copy and One (1) electronic copy.

5. DO NOT SUBMIT BY FAX.

All queries related to this RFQ shall be submitted in writing to the attention of:

Donna Lee, Buyer

Tel: 604-871-6054 E-MAIL: [email protected]

REQUEST FOR QUOTATION No. PS20130914 FLOOD-RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE

TABLE OF CONTENTS

September 26, 2013 Page i

INSTRUCTIONS TO VENDORS AND GENERAL TERMS AND CONDITIONS Pages 1 - 3

1.0 Introduction and Submission Instructions 2.0 Sustainability 3.0 Inquiries 4.0 Pricing 5.0 Terms Of Payment 6.0 Placement of a Purchase Order 7.0 Disqualification 8.0 Evaluation Criteria 9.0 Freedom of Information and Protection of Privacy 10.0 No Promotion of Relationship QUOTATION FORM AND SCHEDULE OF PRICES Pages QF1 – QF6 APPENDIX 1 – SCOPE OF WORK APPENDIX 2 – SAMPLE PROFESSIONAL SERVICES AGREEMENT


INSTRUCTIONS TO VENDORS AND GENERAL TERMS AND CONDITIONS

September 26, 2013 Page 1

1.0 INTRODUCTION AND SUBMISSION INSTRUCTIONS

1.1 The City is seeking quotations to determine if it will issue one or more purchase orders for the supply and delivery of Flood-resilient Construction Primer Review Guide for the Sustainability Department.

1.2 Vendors should carefully review Appendix 1 – Scope of Work for a detailed description of the City’s requirements.

1.3 Vendors should carefully review the City’s standard terms and conditions in Appendix 2 in the sample Professional Services Agreement. The City hereby reserves the right to amend its standard terms and conditions at any time without providing notice to the vendors. If the City issues an agreement pursuant to this RFQ, it is the sole responsibility of the Vendor to review and familiarize itself with the terms and conditions of the purchase order before supplying any goods and services.

1.4 Vendors should submit quotations on the form provided with attachment if necessary. Failure to do so may result in the quotation being put aside and given no further consideration. Failure to complete all fields in the quotation form and schedule of prices may result in the Vendor’s quotation being disqualified.

2.0 SUSTAINABILITY

2.1 The City’s Procurement Policy and related Supplier Code of Conduct found at http://vancouver.ca/doing-business/supplier-code-of-conduct.aspx aligns the City’s overall approach to procurement with its corporate social, environmental and economic sustainability values and goals. It establishes a commitment to maximize benefits to the environment through product and service selection, to ensure safe and healthy workplaces, where human and civil rights are respected, and to support an environmentally sustainable local economy, whenever possible. In doing so, the Policy ensures incorporation of sustainability and ethical considerations as integral evaluation components in best-value supply selection.

2.2 Vendors are to provide environmentally sensitive products or services wherever possible. Where there is a requirement that the Vendor supplies materials, and where such materials may cause adverse effects, the Vendor is to indicate the nature of the hazard in its Quotation. The Vendor is to advise the City of any known alternatives or substitutes for such materials that would mitigate the effects of any adverse conditions on the environment.

3.0 INQUIRIES

3.1 It is the responsibility of the vendor to satisfy itself as to the requirements set out in this RFQ. Inquiries are to be addressed only to the contact person named on the cover page of this RFQ no later than five (5) business days prior to Closing Time. If required, an addendum will be issued to all vendors.

4.0 PRICING

4.1 Prices quoted are to be exclusive of GST.

4.2 Prices are to be quoted in Canadian currency.




5.0 TERMS OF PAYMENT

5.1 The City’s standard payment terms are net thirty (30) days after receipt and approval of invoice; however, any discounts or more favourable terms which may be offered by the Vendor will be taken into consideration in the financial evaluation.

5.2 The Vendor may be asked if it will be willing to accept payment by EFT (Electronic Funds Transfer).

6.0 PLACEMENT OF A PURCHASE ORDER

6.1 Acceptance of a quotation and placement of a purchase order shall be valid only if made by an authorized representative of the City.

6.2 Where the head office of the successful Vendor is located within the City of Vancouver and/or where the successful Vendor is required to perform the services at a site located within the City of Vancouver, the successful Vendor is required to have a valid City of Vancouver business license.

7.0 DISQUALIFICATION

7.1 The City may elect to disqualify any bid that fails to meet any of the requirements of this RFQ. Any deviations from the requirements or conditions specified herein must be clearly stated in the vendor’s response. The City will determine what constitutes an acceptable deviation. If no deviations are indicated in the Vendor’s response, the City will be entitled to interpret that the Vendor offers to perform in full compliance with the requirements and conditions stated herein.

8.0 EVALUATION CRITERIA

8.1 Quotations will be evaluated on the basis of the overall best value to the City based on quality, service, cost, social, economic and environmental sustainability and any criteria set out herein including, but not limited to:

(a) ability to meet specifications stated herein, including and required delivery date stated herein;

(b) Vendor’s past performance;

(c) overall best value to the City;

(d) environmental impact and

(e) any other criteria the City deems, at its sole and absolute discretion, necessary to evaluate the Vendor’s offer.

8.2 The City may elect to not accept the lowest or any quotation, and may terminate or amend this RFQ at anytime.




8.3 If the City identifies an ambiguity in the quotation submitted by the Vendor the City, in its sole and absolute discretion, may seek clarification from the Vendor or put the quotation aside and give it no further consideration.

8.4 The City may request any additional information from the Vendor that the City requires to satisfy itself that the Vendor will be able to supply and deliver the goods and services set out in this RFQ including, without limitation, requiring the Vendor to provide additional product specifications or to furnish evidence of adequate insurance.

9.0 FREEDOM OF INFORMATION AND PROTECTION OF PRIVACY

9.1 The City is subject to the Province of British Columbia’s Freedom of Information and Protection of Privacy Act.

10.0 NO PROMOTION OF RELATIONSHIP

10.1 The Vendor must not disclose or promote its relationship with the City, including by means of any verbal declarations or announcements and by means of any sales, marketing or other literature, letters, client lists, press releases, brochures or other written materials without the express prior written consent of the City (except as may be necessary for the Vendor to perform the vendor’s obligations under the terms of the Contract). Furthermore, the Vendor undertakes not to disclose or promote its relationship with the City in any communication or matter whatsoever as a basis to create an association, express or implied.


QUOTATION FORM AND SCHEDULE OF PRICES

September 26, 2013 Page QF4

Please mail, courier or deliver your submission in person to:

Mail to: City of Vancouver Purchasing Services 453 West 12th Avenue Vancouver, BC V5Y 1V4 Courier/deliver in person to: City of Vancouver Purchasing Services 453 West 12th Avenue Vancouver, BC V5Y 1V4 If delivering by mail, courier or in person, please reference the RFQ number and title on the envelope and ensure that it will be received before the Closing Time. ATTENTION: DONNA LEE, BUYER FROM: _________________________________________ (Company Name) _________________________________________ (Contact Name) SUBJECT: REQUEST FOR QUOTATION No. PS20130914 FLOOD-RESILENT CONSTRUCTION PRIMER REVIEW GUIDE

The undersigned vendor, having carefully read and examined the RFQ and having full knowledge of the requirements described herein, does offer to provide the goods and/or services in accordance with the specifications and terms and set out in the RFQ (except as noted below) and the pricing shown below.




1.0 SCHEDULE OF PRICES

Deliverables Description Completion Deadline

Team Members Team Members Activity Role

Estimated Hours

Maximum Fees

Draft reviewed/revised flood-resilient construction primer

November 15, 2013

1 review meeting with City building staff to discuss – incorporate comments

November 15, 2013

Summary document/table for public and staff quick reference

November 25th, 2013

Final report and summary document December 2, 2013

Grand Total - “Agreement Price” (Maximum Fees and Expenses) excluding GST

Team Members Hourly Rate




2.0 TERMS AND CONDITIONS

By initialling below, the vendor acknowledges it has read and understands the terms, conditions and requirements set out herein and has identified any deviations or alternatives thereto; and if applicable, has provided an explanation of why it will not or cannot comply with any of the terms and conditions set out herein.

Will Comply: Cannot Comply (explain):

Pursuant to and in compliance with this Request for Quotation and any addenda, the undersigned, being familiar with the documents, the site, conditions on site, contract service areas, the character of the equipment and materials needed to carry out and provide the equipment, goods, or services, and all relevant laws, rules, notices, directives, standards, orders and regulations, licensing and permit requirements, labour market, parking and other circumstances which may affect its quotation, hereby offers to supply the equipment, goods or services in accordance with the terms and conditions for the prices as set out herein.

GST Registration No.: Incorporation Date:

City of Vancouver Business License Number:

(If your office is located in Vancouver or N/A if not applicable)

WorkSafeBC Account Number:

Provide the WorkSafeBC registration number and a letter from WorkSafeBC confirming that the Tenderer is registered in good standing with WorkSafeBC and that all assessments have been paid to the date thereof prior to the City having any obligation to pay monies for the services provided.

Dunn and Bradstreet Number:

(or N/A if not applicable)


APPENDIX 1 – SCOPE OF WORK

September 26, 2013 Page A1-1

1.0 BACKGROUND

1.1 The provincial government released new climate change-sea level rise guidelines for flood hazard management in January, 2011. As a response the City of Vancouver has been encouraging an added 1m in flood construction levels in an expanded flood-prone area. Currently, the City is reviewing its flood-proofing policies (http://former.vancouver.ca/commsvcs/guidelines/F010.pdf).

1.2 A gap has been identified in terms of direction for builders, developers and homeowners on flood-resilient construction options. While similar guides exist in Europe, or through the American Federal Emergency Management Agency (FEMA), no comprehensive examples were found for Canada. The Fraser Basin Council published flood-proofing options in 2001 but these are specific to historic settlement areas. The goal is to provide the ‘flood-resilient construction primer’ as an addendum to the flood-proofing policies that are currently being revised.

1.3 A planning student intern drafted a Flood-resilient construction guide for Vancouver and a first pass review was completed by City building staff. Early comments indicate that the content is not context specific enough to Vancouver building methods.

1.4 Recent flooding in New York (Superstorm Sandy), Calgary and Toronto have triggered changes to building codes and ideas about building techniques (re-building) in flood-prone areas.

2.0 TASKS IN SCOPE

2.1 Review the draft flood-resilient construction guide and ensure content reflects the Vancouver context. 2.2 Add additional construction methods and ideas. Review materials from New York, Calgary, and

Toronto and incorporated key lessons learned.

(a) It is anticipated that this task will include conversations with at least Calgary staff/officials. Vancouver staff can provide contact information.

2.3 Create a column for the tables (Section 8-11) indicating order of magnitude/relative cost/effort of the measure. 2.4 Provide examples of temporary flood barriers. 2.5 Provide a paired down summary version of the guide for quick reference (max. 5 pages in length). 2.6 Provide pictures of some measures for reference. 2.7 Facilitate 1 review meeting with City of Vancouver staff and representatives from several

neighbouring municipalities (e.g. North Van, West Van) to ensure content is complete and correct. Incorporate outcomes of this meeting in the document.

2.8 The City is seeking creative ideas on making the flood-resilient construction primer review guide to be comprehensive and user-friendly.


APPENDIX 1 – SCOPE OF WORK

September 26, 2013 Page A1-2

3.0 OUT OF SCOPE

(a) Desktop publishing

(b) General language editing (c) Re-writing sections unless otherwise agreed to.

4.0 ATTACHMENT

(a) Draft flood-resilient construction guide.

FLOOD RESISTANT & RESILIENT DEVELOPMENT PRIMER

Source: FEMA Mitigation Directorate, Bulletin 7-93

REQUEST FOR PROPOSAL No. PS20130914 FLOOD RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE APPENDIX 1 - SCOPE OF WORK - ATTACHMENT

Page A1-3

TABLE OF CONTENTS

1 PURPOSE & SCOPE.......................................................................................4

2 INTRODUCTION OF TERMS...........................................................................4

3 SEA LEVEL RISE & FLOOD RISK OVERVIEW..............................................5

4 ADAPTING BUILDINGS TO FLOOD RISK: THE BUSINESS CASE..............7

5 WATER ENTERY ROUTES AT THE BUILDING LEVEL.................................8

6 OVERVIEW OF DAMAGE BY DEPTH OF FLOODWATER ...........................9

7 FLOOD RESISTANT AND RESILIENT CONSTRUCTION: OVERVIEW.......10

7.1Improving the flood performance of new buildings......................10

7.2Resistance Measures.......................................................................10

7.3Resilience Measures.........................................................................11

8 FLOOD RISK REDUCTION MEASURES: NEW DEVELOPMENT.................13

9 FLOOD RISK REDUCTION MEASURES: RENOVATIONS & RETROFITS..18

10 FLOOD RISK REDUCTION MEASURES: ALL DEVELOPMENT................20

11 FLOOD RISK REDUCTION MEASURES: TEMPORARY MEASURES.......22

12 EXAMPLES OF INNOVATIVE FLOOD ADAPTED BUILDINGS..................23

12.1 Rotterdam Floating Pavilion.......................................................23

12.2 Flood-proof houses for the future: a compendium of design 24


Page A1-4

1 PURPOSE & SCOPE

The purpose of this guide is to support the necessity to adapt buildings to local climate

change impacts. This document contains site and building specific measures to integrate

flood resistance and resilience into new developments, and into renovations and retrofits.

There is also a section on temporary resistance measures. These are flood risk reduction

measures that are installed prior to a flood event and removed afterwards. All in all, these

measures are intended to adapt buildings to the increased risk of coastal flooding associated

with climate change.

The document is primarily aimed at planners, developers, their partners, design teams,

architects, and engineers, but it is also expected to be useful to those within the wider

development community, including investors, land purchasers, insurers and lawyers.

2 INTRODUCTION OF TERMS

Adaptation: In human systems, adaptation is the process of adjustment to actual or expected climate and its effects, in order to moderate harm or exploit beneficial opportunities1.

Flood avoidance: Constructing a building and its surrounds (at site level) in such a way to avoid it being flooded (e.g. by raising it above flood level or re-siting outside flood risk area etc)2.

Flood resistance: Constructing a building in such a way to prevent floodwater enteringthe building and damaging its fabric3.

Flood resilience: Constructing a building in such a way that although flood water mayenter the building its impact is reduced (i.e. no permanent damage is caused, structural integrity is maintained and drying and cleaning are facilitated)4.

Tanking: A variety of methods used to prevent the infiltration of sub-surface water into a building, namely basements and walls and floors close to the water table.

Ingress: The unwanted entry of flood water, foreign bodies, contaminants etc.

Egress: The exit, way out or escape route, namely for flood water.

Plinth: A heavy base or, as used in architecture, the lower square slab at the base of a column.

Bund: An embankment, wall or causeway.

1 International Panel of Climate Change (IPCC). 20112 UK Department for Environment Food and Rural Affairs (Defra), Communities and Local Government (CLG) and Environment Agency. 2007. Improving the Flood Performance of New Buildings3 ibid4 ibid


Page A1-5

3 SEA LEVEL RISE & FLOOD RISK OVERVIEW

Global context

The phenomenon of sea level rise (SLR) is a direct result of global warming due mainly to:

thermal expansion (ocean water expands as it heats up) and melting of glaciers and icecaps

(as ice on land melts, additional water flows into the ocean)5. Since 1870, global sea level has

risen by approximately 20 cm6. Prior to 1993, global sea level data came from tide gauges.

Since then, measurements are also obtained from satellites. Both types of measurements

provide evidence that the SLR has accelerated. Satellite measurements show that sea level is

rising at approximately 3.4 mm per year. Analysis shows that the rate of rise is closely tied to

temperature. Essentially, as the average global temperature increases, ocean levels rise

faster.

Projections for average future SLR indicate that a rate of accelerated rise will continue for

hundreds of years, even assuming global temperature is stabilized. A combination of scientific

modelling and observations indicate that this will translate into 1 to 2 metres of global average

SLR by 21007. Forecasting and understanding of this complex issue is continually being up-

dated, for which the numbers are generally increasing. In terms of coastal land use planning

and development, it is important to underscore that SLR exacerbates flood risk in areas that

are already vulnerable to coastal hazards and creates risk for areas that have not previously

been exposed to flooding.

Regional context

In 2011, the Ministry of Environment released a draft policy entitled 'Climate Change Adapta-

tion Guidelines for Sea Dikes and Coastal Flood Hazard Land'. Based on the most up to date

peer reviewed science, the provincial guidelines provide a range of projections for mean (av-

erage) global increase in sea level8. The projections translate into the following figures for

planning:

5 Allison, Ian. 2011. The copenhagen diagnosis: Updating the world on the latest climate science. Burlington, MA: Elsevier

6 IPCC. 2007. Fourth Assessment Report (AR4).7 Allison, Ian. 2011. The copenhagen diagnosis: Updating the world on the latest climate science. Burlington,

MA: Elsevier8 BC Ministry of Environment. 2011. Climate Change Adaptation Guidelines for Sea Dikes and Coastal Flood

Hazard Land


Page A1-6

BC Ministry of Environment sea level rise planning figures9

Development Timeframe Global increase in mean sea level

Regional sea level rise

Lifespan to Year 2050 0.5 m To be developed on a site specific basis.Lifespan to Year 2100 1.0 m

Lifespan to Year 2200 2.0 m

It is important to note that sea levels differ significantly by region and by specific location. At

the regional and local scale, sea level is affected by factors such as ocean salinity, wind and

currents as well as by the upward or downward movement of land, which is still slowly read-

justing to the melting of ice sheets since the end of the last Ice Age10.

Local context

The City of Vancouver's Climate Adaptation Strategy identifies SLR as an anticipated change

in local climate. As noted in the strategy the priority impacts for the City are:

Increased flooding and storm surge damage along the coast and Fraser River as sea levels rise and storms are more frequent.

Increased damage to coastline structures from storm surge, flooding and salt water in-trusion.

Reduced gravity drainage of existing system as sea levels rise, resulting in more fre-quent flooding of low areas near storm sewer outfalls.

Increase in shoreline erosion affecting natural environments and public amenities such as parks, trails and access to water.

Currently, as the City works towards completion of a Coastal Flood Risk Assessment to de-

termine the local effects of SLR on coastal flooding, the flood-proofing policies are under re-

view. As the policy document states, Council objectives are “...to reduce or prevent injury, hu-

man trauma and loss of life, and to minimize property damage during flooding events”. To

meet these objectives, the policies establish setbacks from the natural boundary of any Wa-

tercourse that may flood and minimum building elevations, referred to as Flood Construction

Levels (FCLs), to minimize flood risk and to prevent damage in the event a flood does occur11.

This guide serves to complement the City's flood-proofing policies as they are amended to in-

corporate locally specific SLR impacts.

9 City of Vancouver Climate Adaptation Strategy, 201210 City of Vancouver Climate Adaptation Strategy, 201211 City of Vancouver Flood-Proofing Policies, amended April 17, 2007


Page A1-7

4 ADAPTING BUILDINGS TO FLOOD RISK: THE BUSINESS CASE

Framing risks as business opportunities

This section on making the business case for adapting buildings to flood risk is based on a

report entitled 'Adapting to climate change: a checklist for development' that was produced to

underscore the need for developments to be designed according to local climate change

impacts12.

It is critical that planners, developers, designers, architects, and others involved in coastal

land use development, consider the financial implications of SLR as a result of climate

change, a central component of the business case for building, and investing in, new

development. As the understanding and awareness of local climate change impacts improves,

buildings that are designed according to climate change risks, including flooding, may be

easier to sell, and at a higher price.

Homebuyers are increasingly interested in the overall sustainability and performance of

homes. Designing for flooding will reduce damage, costs and the timeframe for homes and

businesses to be usable after a flood event, which translates into increasing the building's

value. In effect, the aim is to reduce long-term operational costs so that the future asset value

will be higher.

When cost benefit analyses are being done, taking a long-term view at the design stage

makes a lot of financial sense. The underlying assumption is that being proactive on climate

change issues will positively impact business’ bottom line and reputation.

In addition to the many challenges and risks that climate change presents, development and

planning communities can also take advantage of opportunities. Some of these risks and

opportunities are identified below. Please note that opportunities and risks are not listed in

order of priority or significance.

OPPORTUNITIESFinancial

Higher future asset values due to lower long term repair costs as a result of resilient design and construction.

Good financial sense for investors taking a long-term view at the design stage, especially to those considering corporate social responsibility (CSR).

Investors with assets that are vulnerable to climate risks such as flooding may strategically offload those assets in favour of climate proofed assets.

12 Greater London Authority. 2005. Adapting to Climate Change: a Checklist for Development


Page A1-8

Market DifferentiationProperties are easier to sell or rent for a higher price as clients find well designed, well protected buildings more attractive.

Opportunities to position the organization as a market leader on 'flood proofed' or 'flood resilient' buildings by drawing attention to the organization's innovation and gain a competitive advantage over competitors by the ability to demonstrate CSR credentials.

Superior Risk ManagementReduce the potential risks through pro-active risk management of climate change impacts.

This will contribute towards 'mainstreaming', or integrating, climate impacts and adaptation into business strategies.

Staff & Resident RetentionImprove working and living conditions by reducing flood risk.

Socially Responsible Investor (SRI) Funds To date, the market for targeted SRI funds is relatively small but it is growing, as demonstrated by the creation of financial indexes such as the FTSE4Good and the Dow Jones Sustainability Index (DJSI).

Investors are increasingly interested in ranking organizations according to their environment and social performance.

Additionally, the Global Reporting Initiative (GRI) seeks to make sustainability reporting comparable on a company by company basis.

Foster Innovation & CreativityEncourage staff to contribute to the organization's competitive advantage by finding new and innovative solutions to building long-term climate/flood resilience into developments.

RISKSOperational & Financial

Failure to appropriately adapt to climate impacts, otherwise known as 'maladaptation', may result in a development becoming too expensive to maintain and possibly uninsurable later in its life cycle.

If buildings are not adequately or appropriately adjusted to current and projected climate conditions there may also be serious negative implications when attempting to sell or rent property in the future as the asset value will be reduced, thereby resulting in a less attractive investment upfront.

Consumer ExpectationsDepending on the expected life span of a building, which is generally between 50 and 100 years, it is critical to recognize that buyers expect developments to be designed for the range of climate conditions throughout that timeframe. These expectations will likely become more prevalent as communities become increasingly aware of the need for local adaptation to climate change.

Leadership Ahead of Regulatory ChangeIt is anticipated that building regulations and standards may change to include site and building specific requirements for flood risk reduction in areas of risk. By failing to take voluntary action now, it is possible that expensive remedial measures may need to be taken to ensure compliance as new regulations are implemented.

Reputation RisksOrganizations risk their reputation if climate change risks are not addressed and a building, development and/or land loses value and becomes less desirable as a result of flooding.


Page A1-9

5 WATER ENTERY ROUTES AT THE BUILDING LEVEL

Through gaps around pipes and cables that pass through walls. Through party walls from property next-door if it is flooded or through party walls of

terraced or semi-detached buildings if the attached building is flooded. Through airbricks, door thresholds, inadequate seals between windows, doors and

frames. At gaps and cracks in joint sealant around doors and windows. Through permeable (or cracks in) brickwork, blocks, stone and mortar. Through weathered and damaged mortar. At the damp-proof course where the lap between the wall damp proof course

and floor membrane is inadequate. Services entries e.g. utility pipes, ventilation ducts and electricity and TV cables.

The following diagram illustrates potential routes for floodwater ingress:

Source: The UK Environment Agency, 2003 as cited by CIRIA.


Page A1-10

6 OVERVIEW OF DAMAGE BY DEPTH OF FLOODWATER13

Depth of Floodwater Damage to the building Damage to service and fittings

Below ground floor level

Possible erosion beneath foundations, causing instability and settlement Possible corrosion in metal components (e.g. joist hangers) Excessive moisture absorption in timber, causing warping Cracking of ground floor due to uplift pressures Accumulation of contaminated silt Structural and material weaknesses from inappropriate drying Rot and mould Damage to wall finishes and insulation

Damage to electrical sockets and other services to basements and cellars Damage to fittings in basements and cellars Damage to mechanical equipment

Ground level to half a metre above floor

level

Build up of water and silt in cavity walls, with potential reduction in insulating properties, for some materials Immersed floor insulation may tend to float and causes creeds to debond Damage to internal finishes, such as wall coverings and drywallFloors and walls may be affected to varying degrees (e.g.swelling) and will require cleaning and drying out Timber based materials will likely require replacement Damage to internal and external doors and skirting boards Corrosion of metal fixings Rot and mould

Damage to water, electricity and gas meters Damage to low level boilers and some underfloor heating systems Damage to communication wiring and services Carpets and floor coverings may need to be replaced Timber based kitchen units are likely to require replacement Electrical appliances may need to be replaced Insulation on pipe work may need replacing

Half a metre and above

Increased damage to walls (as above) Differential heads of greater than 0.6m across walls could cause structural damage, although this will vary depending on the structure of the building. Damage to windows can be caused by much smaller differential pressures High speed flow around the building perimeter can lead to erosion of the ground surface; there is also the potential risk of damage to the structure from large items of floating debris

Damage to higher units, electrical services and appliances

13 UK Defra, CLG and Environment Agency. 2007. Improving the Flood Performance of New Buildings


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7 FLOOD RESISTANT AND RESILIENT CONSTRUCTION: OVERVIEW

The aim of flood resistant and resilient measures is to minimize risk to inhabitants and to

property, and to allow residences and businesses to be habitable/usable as quickly as

possible after a flood event.

It is important to note that only a small percentage land, and of total building stock, is

vulnerable to coastal and river flooding within the City of Vancouver. Flood resistant and

resilient construction measures only apply to flood prone areas. Measures to achieve

resistant and/or resilient buildings, see tables 8-11 below, are compiled from the following

sources:

UK Environment Agency and Communities and Local Government. 2007. Improving the Flood Performance of New Buildings: Flood resilient construction

UK Environment Agency and the Guildford Borough. 2010. Flood Risk Reduction Measures

Construction Industry Research and Information Association (CIRIA). Improving the flood resistance of your home – advice sheets

RAB Consultants Ltd. Homeowners Guide to Flood Resilience: A Living Document

The following sub-sections provide an introduction to the concepts and reasoning for

implementing flood resistant and resilient measures.

7.1 Improving the Flood Performance of Buildings

According to the UK Environment Agency14, raising the ground level of a development or

raising the level of the first habitable floor above the minimum FCL, generally referred to as

avoidance, may not be possible for many reasons such as economic viability, ground

instability, unacceptable aesthetics, and planning concerns for level access or for safe

evacuation.

If, in consultation with the City Planning Department, it is determined that flood avoidance by

achieving the minimum required FCL is not feasible, using flood resistant and/or resilient

measures may be considered. It must be noted that these measures alone are insufficient as

they will not meet the City's floodproofing policies objectives. They should therefore only be

used to complement the highest attainable FCL.

7.2 Resistance measures

Resistance measures aim to prevent floodwater ingress (entry) into a building; they are

designed to minimise the direct impact of floodwaters to buildings and to give occupants time

to prepare for a flood. They will likely only prevent water ingress for a limited period of time as

they include the use of low permeability materials that reduce the rate of water ingress into a

14 UK Defra, CLG and Environment Agency. 2007. Improving the Flood Performance of New Buildings


Page A1-12

property or building.

As both avoidance and resistance measures may only delay water from reaching a

development or entering a building, it is best not to rely on these measures alone. Once these

measures are considered, the next step is to explore how to design and construct buildings to

be more water resilient.

7.3 Resilience measures

To determine which resilience measures will be effective, the first step is to establish the

anticipated potential depth and duration of flooding for the development site.

For most flood events, total prevention of water ingress, referred to as 'resistance' or ‘dry

proofing’, to a development or a building is very difficult to achieve. To achieve resilience,

there are two main approaches, both of which depend on the depth of flooding.

7.3.1 Water exclusion strategy

Here the focus is:

to minimize water entry to maintain structural integrity, and to use materials and construction techniques that facilitate drying and cleaning

This is the approach to use when flood water depths of 0.3 m or less are anticipated. Although

this approach is a resistance measure, it is essentially part of the overall objective of

designing and constructing a flood resilient building.

Note that this form of construction should be used with caution as buildings may be damaged

by water pressure and/or debris if flood depths are higher than anticipated. In such an event,

resistance measures may fail leading to water rapidly entering the building. It is therefore

recommended that resistant construction is coupled with resilience measures15.

7.3.2 Water entry strategy

Here the focus is:

to allow water to enter the building, and to facilitate draining and drying

Generally, due to excessive water pressure, buildings are at significant risk of structural

damage if the water level difference between the outside and the inside exceeds 0.6m. This

approach is recommended when flood water depths of 0.6 m or more are expected16.

15 UK CLG. 2012. Technical Guidance to the National Planning Policy Framework16 UK Defra, CLG and Environment Agency. 2007. Improving the Flood Performance of New Buildings


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8 FLOOD RISK REDUCTION MEASURES: NEW DEVELOPMENT

The following table contains measures that, when incorporated into new buildings at the design andThe following table contains measures that, when incorporated into new buildings at the design and

construction stages, will reduce the risks and costs associated with flooding.construction stages, will reduce the risks and costs associated with flooding.

Measure Type

Measure Description Proven Advantages

Design Considerations

Policy Objective Met *1 = reduce or prevent injury, trauma and loss of life*2 = minimize property damage

RESISTANT Raised porch threshold

Provides an added barrier prevent flood water from entering front or back door. Build with a higher doorstep level than the entrance

-unobtrusive-multifunctional-cost is equivalent to a standard porch-ramps can be built for disabled access -integrated with property design

-effective for low flood depth-consider accessibility-more effective if water resistant materials and doors are used-no quality standard for flood protection

Gates Solid flood resistant gates with waterproof seals

-proven in floods-reduces water entry and damage

-extensive groundwork may be required-may require regular maintenance

Low bund Bunds provide an effective site specific flood defence

-can prevent floodwater from reaching property/building -provides site specific and/or community protection-suitable where it will not impact flood water flows and storage

-generally only effective for low depth flooding-may need to provide pumping capacity for floodwater seepage-expert engineering design is required to ensure breaching will not occurand that risk is not increased elsewhere

Sump & Pump

Designed to extract flood water faster than it enters

-if fitted correctly and of sufficient capacity, can remove floodwater-can be rented for flood events, which is cost-effective for infrequent use

-consideration possible structural risk due to pumping from a basement-should be tested regularly to ensure maintenance-the discharge pipe must be higher than the anticipated flood level-consider impact on neighbours

Air vents Designs are available to prevent water entry for low depth flooding

-seek out products such as periscopic air vents

-joints must be carefully sealed

Permanent wall barrier

Designed to stop water entering through walls

-can use glass to minimise visual impact and allow light in-wood effect to mimic a fence

-expensive-needs careful design and construction-may need measures to deal with seepage

Tanking (sealing and rendering)

Tanking is the application of a layer of material to a wall or floor to increase its resistance to water entry. The aim is to achieve total waterproofing.

-offers groundwater protection-significant risk reduction -render can be made of cement and/or hydrated lime and sand

-needs sump and pump-vulnerable to damage due to later alterations-primarily designed to protect against groundwater-only appropriate for low depth flooding


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Water-resistant external doors & windows

Designed to prevent water from entering through doors and windows

-unobtrusive-doors: more effective of combined with a raised threshold; sealed PVC external framed doors; if wood is preferred, ensure a good fit and seal to the frame

-may need measures to deal with seepage-difficult to evacuate if people are trapped inside with rising water-a door may keep water out at depths that are dangerous to the structure of the building

Sealant for doors & windows

To prevent water entry

-unobtrusive-inexpensive

-needs careful application -relies on waterproof doors/windows

Ceramic tiles

Internal finishing material that protects the wall from water ingress from the inside of the building

-minimizes flood damages-should be applied to a height of at least 500mm above the expected flood level-likely to be more economically viable and environmentally acceptable

-should be applied to a level sand/cement layer using a water resistant grout-should not be applied over layers of gypsum plaster, which can be damaged by floodwater

Lime plaster and hydrated lime coatings

Internal finishing material that protects from water ingress

-less damaged by exposure to flood water-dry out quickly after flooding

-cannot be further improved-handle materials with care -alkaline can irritate skin

Reinforced concrete wall & floor

Effective at resisting forces generated by floodwater

-will provide an adequate barrier to water ingress

-must ensure service ducts and other openings into the building are adequately sealed

Plaster-board over solid walls and cavity walls (also known as 'dry lining')

Internal finishing material that protects the wall from water ingress

-can place the sheets horizontally to reduce the number of sheets needing replacement-consider the maximum height of flooding to minimize damage and cost

-when exposed to floodwater, will likely need to be replaced

Internal lining of timber-framed walls

Lining will likely need to be removed after a flood to allow the timber frame to dry out

-consider water resistant boards such as marine plywood with demountable fixings, sacrificial joints and a lime based finishing layer

-difficult to make resistant or resilient because of the need to remove post flood

Skirting Internal finishing measure to protect from water ingress

-plastic skirting will not be affected by floodwater-glued on skirting can be easily removed -can use treated wood, painted on all sides-can use skirting boxed out from the wall to enable easy drying post flood

-untreated wood skirting may distort and need replacing

Insulation Water-resistant, low absorption materials that will not collapse. Cavity

-consider material such as polystyrene sheets or self-draining mineral wool slabs

-post flood drying time may be extended -water entry may cause insulation to float (if there is


Page A1-15

walls may be filled with closed-cell foam to reduce water penetration.

-place above the floor slab, under the floor finish, rather than below, to minimise water impact

low mass cover) and lead to debonding of screeds

RESILIENT Raised fittings

Fittings such as electrical appliances and utility meters are raised above the FCL

-effective if raised above flood level-use easily removable solid wood doors and drawers-provide gaps behind kitchen units to facilitate drainage and drying

-cost needs to be assessed against the predicted flood frequency -avoid wood fibre baed carcases-high quality workmanship is necessary

Coat walls Walls coated with internal cement based renders

-apply tanking on inside of every internal wall-effective if done correctly-dries quickly

-requires good workmanship-must be regularly checked and maintained

Internal lining/tank-ing of walls

Internal cement renders/tanking on the inside of every internal wall

-significant reduction of leakage into building-assist rapid drying of internal surface of the wall

-the extent that drying of other parts of the wall is prevented is not clear-this is an important consideration

Solid Concrete Floors

Ground supported floors with concrete slabs coated with impermeable membrane. A damp proof membrane of polyethylene sheet or liquid coating of asphalt or bitumen is usually placed below or above the slab.

-less expensive and faster to restore after flooding-the preferred option as the rate and amount of water rising up through the floor is reduced-recommended use of concrete slabs of at least 150mm thicknessfor non-reinforced construction-generally suffer less damage than suspended floors

-requires good workmanship-to ensure structural integrity - calculations may be necessary to ensure that the floor (including any lateral support provided at the perimeter) has thenecessary strength to resist uplift forces without deformation or cracking-hollow slabs are not suitable if the elements arenot effectively sealed

Suspended concrete floors

Modern floors are precast concrete beams set on sleeper walls at the damp proof course level, infilled with concrete blocks

-generally suffer more damage than solid concrete floors-water resistant insulation such as solid boards of expanded polystyrene can be removed, cleaned and reused -suitable in shrinkable & expanding soils (e.g. clay) or where the depth of fill is greater than 600mm

-has a cavity that will need to be cleaned and dried after flooding-to ensure structural integrity, calculations may be necessary to ensure that the floor (including any lateral support provided at the perimeter) has thenecessary strength to resist uplift forces without deformation or cracking

Suspended timber floors

Timber beams placed on edge and supported at the ends by the walls. Support may consist of a

-usually requires a vent under the floor to the outside to prevent build up of dampness-a cavity/sub-floor space will allow for

-uplift forces of floodwater may affect structural integrity-as timber is prone to deformation and cracking, alternative materials such


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wooden 'wall plate', slots in or edges out from the wall.

cleaned and drying after a flood

as steel are recommended

Damp Proof Membrane

To be included in any design to minimise the passage of water through ground floors.

-impermeable polythene membranes should be at least 1200 gauge to minimise ripping-experience has proven the effectiveness

-care must be taken to stretch the membrane to retain a waterproof layer-effective methods of joining membrane sections are overlaps of 300mm and taping (mastic tape with an overlap of 55mm minimum)

Pipework Where possible, all service entries should be sealed

-minimizes flood damage-closed cell insulation should be used below predicted flood level

-quality workmanship is required

Drainage services

Non-return valves to prevent back-flow is recommended

-can prevent back-flow of water and sewage where risk is identified

-maintenance is important to ensure continued effectiveness

Water, electricity and gas meters

Should be installed above predicted flood level along with electrical sockets

-damage is minimized-re-occupancy is hastened

-expertise and quality workmanship is required

Heating systems

Units should be installed above predicted flood level

-conventional and radiant heating systems are unlikely to be affected but salt intrusion can cause corrosion

-avoid underfloor heating on ground floors -controls should be placed above flood level

Communic-ation wiring

Wiring for telephone, TV, internet and other services should be protected

-suitable insulation in the distribution ducts can prevent damage

-design solutions should be coordinated with the service provider

Water compatible woodwork

Designed to reduce damage caused by water entering the building.

-relatively inexpensive/cost effective

-there are still cleaning and drying costs following a flood

Water compatible stairs

Designed to reduce damage caused by water entering the building.

-concrete, hardwood and steel can be cost effective if designed to sustain water exposure

-there are still cleaning and drying costs following a flood

Raised utilities

Designed to prevent exposure and water damage.

-permanently in place -there is a practical limit to how high electrics can be raised

Raised kitchen appliances

Designed to prevent water exposure and damage.

-relatively low cost -permanently in place

-here is a practical limit to how high electrics can be raised

Removable fixtures and fittings

Example is quick removable hinges for internal doors or removable radiators.

-relatively low cost -rapid deployment

-requires occupant to maintain and deploy


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9 FLOOD RISK REDUCTION MEASURES: RENOVATIONS & RETROFITS

The following table contains measures that, when incorporated into major renovations and retrofits, will

reduce the risks and costs associated with flooding.

Measure Type

Measure Description ProvenAdvantages


Policy Objective(s) Met*1 = reduce or prevent injury, trauma and loss of life*2 = minimize property damage

RESISTANT Resistant/waterproof external doors and windows

Materials and construction with low permeability

-proven to reduce flood ingress -reduces damage

-extensive groundwork may be required-must not be used in isolation-may require regular maintenance

Repair cracks in walls & seal service outlets

Prevents water entry -unobtrusive-inexpensive-consider expanding foam or gun-applied sealant

-needs careful applications-needs water-resistant formula-may just reduce penetration rate

Facing/En-gineering bricks


-more effective than sealing existing wall

-need good workmanship-below ground work-may just reduce penetration rate-visually alters building

Wall Render

To seal walls and prevent water entry

-should seal all cracks even when walls are in poor condition

-needs good workmanship-below ground work-may only reduce penetration rate

Door and Window seals

Replace existing seals to prevent water entry

-can be effective if products and workmanship are good

-seal must be continuous and unbroken-must eliminate points of entry such as keyholes, letter boxes and cat flaps

Treat wooden frames and doors

To prevent water leakage through wooden frames and doors.

-can prevent warping and opening of gaps in the future-oil-based or waterproof stains, pain or varnish can be effective

-should treat both external and internal surfaces of exposed wood

Water-resistant airbricks


-inexpensive-unobtrusive

-needs careful installation and maintenance-may need measures to deal with seepage

Non-return valves for wastewater pipes and washing machine outlets

Prevent water from entering pipes

-unobtrusive-inexpensive-easy fit

-may need to assess the impact on neighbours

Bunds Bunds provide an effective site specific flood defence

-can prevent floodwater from reaching property/building

-generally only effective for low depth flooding-may need to provide pumping capacity for


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-provides site specific and/or development wide protection-suitable where it will not impact flood water flows and storage-suitable where space allows

floodwater seepage-expert engineering design is required to ensure breaching will not occur-assessment required to ensure risk is not increased elsewhere

Sump and Pump

A system installed so that floodwater may be pumped away faster than it enters.

-if fitted correctly and of sufficient capacity, can remove floodwater-can be rented for flood events, which is cost-effective for infrequent use-consider solar or battery powered options in the event that electricity fails

-consideration possible structural risk due to pumping from a basement-should be tested regularly to ensure maintenance-the discharge pipe must be higher than the anticipated flood level-consider impact on neighbours

Boundary walls and fencing

Designed to create flood resistant barriers. Solid gates with waterproof seals, or fencing where the lower elements are constructed to be more flood resistant.

-prevents floodwater from reaching property-very effective-modern, aesthetic designs-unobtrusive

-may affect flood risk to neighbours – this must be assessed and prevented-requires regular maintenance-requires space on the property

RESILIENT Move all electrical devices above the designated flood level

Place electrical devices such as sockets, electrical appliances and utility meters above FCL so they are well out of reach of flood water.

-very effective-relatively inexpensive compared to the cost of flood damage-no extra cost if undergoing a planned renovation

-expertise and quality workmanship is required

Resilient Internal walls

Walls are coated with internal cement based renders; apply taking on the inside of every internal wall that is below the FCL.

-effective if applied correctly-minimizes damages to walls and floors-dries quickly

-requires good workmanship-must be regularly checked and maintained

Resilient floors

Floors with concrete slabs coated with impermeable membrane.

-effective-relatively inexpensive compared to damage cost

-requires quality products-requires skilled workmanship

Basement tanking

Tanking basements, or ground floors with water resistant membranes.

-effective if applied correctly-minimizes damage to walls and floors-dries quickly

-requires quality workmanship-can only be applied when property is dry-use in conjunction with resistant doors and other resilient measures


Page A1-19

10 FLOOD RISK REDUCTION MEASURES: ALL DEVELOPMENT

The following table contains measures that, when incorporated into a development an any stage, will


Measure Type



Policy Objective(s) Met

*1 = reduce or prevent injury, trauma and loss of life*2 = minimize property damage

Rainwater Harvesting

Sustainable Drainage System

Capture of rainwater from roofs for reuse.

-reduction in the volume and rate of storm water runoff-additional benefit of achieving water efficiency

-for detailed design requirements refer to CIRIA C609 www.ciria.org

Permeable Paving


Infiltration of surface water into the underlying ground.

-reduction in the volume and rate of storm water runoff-system allows for sedimentation, filtration, absorption, biodegradation and volatilization of pollutants

-for detailed design requirements refer to CIRIA C609 section 3.6 or FEMA Subdivision Design in Flood Hazard Areas chapter 4

On-site water attenuation - such as detention basins and ponds


On-site storage techniques, usually above ground, designed to capture surface water runoff.

-provide storm water attenuation and volume reduction-pollutant removal via absorption and biodegradation-provide green open space

-for detailed design requirements refer to CIRIA C609 or FEMA Subdivision Design in Flood Hazard Areas chapter 4

Improving Flood Warning

Emergency Planning

Sign up for Environment Canada Weather warning service www.weatheroffice.gc.ca/warnings/warnings_e.html

-saves lives by providing advance warning of a flood so people can evacuate/find shelter-provides time to put damage prevention measures in place

-requires an awareness of what the different levels of flood warning are and what the appropriate actions to take are

Emergency Planning and response

Emergency Planning

Ensure each building and household has an emergency flood plan in place so inhabitants know what actions to take once a flood warning is received.

-emergency preparedness saves lives and reduces damage to both property and possessions/goods

-there might not be sufficient time to return to implement the plan before flooding begins

Flood Preparedness

Relocate valuables

Involves moving valuables upstairs or above the predicted flood level. Valuables can be raised on tables, high cupboards or plinths.

-no cost -quick and easy

-requires occupant to deploy -large items may be difficult to move

Water-tight covers for valuables

Bags and containers designed to be flood/water proof.

-quick to put in place-inexpensive

-requires occupant to store bags and put measure into place prior to flooding.


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http://www.ciria.org/http://www.weatheroffice.gc.ca/warnings/warnings_e.htmlhttp://www.weatheroffice.gc.ca/warnings/warnings_e.htmlhttp://www.weatheroffice.gc.ca/warnings/warnings_e.html

11 FLOOD RISK REDUCITON MEASURES: TEMPORARY

The following table contains temporary flood risk reduction measures that must be installed prior to a

flood event and removed once floodwaters have subsided. If applied properly, these measures will


Measure Type


Design Considerations Policy Objective(s) Met

*1 = reduce or prevent injury, trauma and loss of

life*2 = minimize property

damage

RESISTANCE Entrance door/patio door/garage door & window barriers

Designed for temporary flood resistance

-rapid deployment-relatively low cost-low weight and easy deploy products available

-storage of items-some barriers need tools for deployment-permanent fixings on the building with most products-deployment may be difficult for people with physical disabilities-may need measures to deal with seepage

Sandbags & absorbent bags


-relatively low cost-absorbent bags: lightweight, ready to use, quick to deploy, holds tens of litres of water

-sufficient bags must be stored ready to use-used bags need to be disposed

Pet flap covers


-relatively low cost-rapid deployment-low weight and easy deployment

-storage of items-some barriers need tools for deployment-permanent fixings on the building with most products-deployment may be difficult for people with physical disabilities

De-mountable barriers


-property fully protected-structure of building is not the limiting factor-some products can be stored in situ

-need sufficient warning-some knowledge and a certain degree of physical ability is required-most products need separate storage-significant loss of floodplain-high initial costs-groundwork required-may need pumps to deal with seepage-security may be needed to prevent theft

Free-standing barriers


-property fully protected-structure of building is not the limiting factor

-need sufficient warning-some knowledge and a certain degree of physical ability is required-most products need separate storage- Significant loss of floodplain-High initial costs-May need significantmanpower to deploy-Designed more forcommunities rather than


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individuals-May need measures to deal with seepage

Airbrick covers

Sealed covers are fitted onto air bricks to stop ingress of flood water through vents in the air bricks.

-inexpensive-effective-easy/quick to apply-easy to remove

-need sufficient warning-requires storage and easy accessibility-may need measures to deal with seepage

Toilet plugs To prevent water from entering pipes

-inexpensive-no permanent installation required

-need sufficient warning-requires storage and to be easily located after a flood warning-needs to be correctly deployed

Bolt-down inspection covers

To prevent water from entering pipes

-inexpensive -need sufficient warning-needs to be correctly deployed

Appliance vent covers

To prevent water from entering pipes

-inexpensive -need sufficient warning-need to be correctly deployed

Pipe bungs To prevent water from entering pipes

-inexpensive -need sufficient warning-needs to be correctly deployed

12 EXAMPLES OF INNOVATIVE FLOOD ADAPTED BUILDINGS

12.1 Rotterdam, Netherlands

In large part, Rotterdam lies below sea level. The city is protected from the sea by an

extensive system of dikes, closure dams and storm surge barriers. 40,000 of Rotterdam’s

inhabitants live outside the dike system. For them and as part of the ‘Rotterdam Climate

Initiative’, new types of innovative development are underway, such as flood resilient

retrofitting and new adaptive housing types like floating homes17.

Floating Pavilion

The pavilion opened in 2010 and is an example of a climate change resilient building.

Depending on the success of this project, floating homes may be part of the new climate

adaptation strategy.

17 City of Rotterdam. 2010. Connecting Delta Cities: sharing knowledge and working on adaptation to climate change.


Page A1-22

Source: The sustainable Floating Pavilion Rotterdam. www.myblogtblogspotcom.blogspot.ca

12.2 Flood-proof houses for the future: a compendium of designThe following designs are the winners of a competition held by Norwich Union Insurance18.

Designs fit into one of four strategic approaches:

1. raising the level of accommodation above the design flood level2. floating or amphibious designs3. resistant design4. resilient design

The challenge: to reconcile designing for flood risk and fulfil the following criteria:

mitigation equal access safety and security economically viable development.

18 Norwich Union. 2008. Flood-proof houses for the future: A compendium of design


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No.1: The Turnaround House

Strengths assumption that water will enter the house design features to minimise flood impacts and quickly resume life as usual

Weaknesses additional prevention of low levels of floodwater from entering the house added resistant measures to prevent less severe more frequent floods from entering

the house

The 3 design principles are 1. Creating an adaptable house that responds to a flood, without compromising living during the rest of the year. 2. Ensuring that occupants’ needs are met at all times. 3. Acting as a physical link to the community and its support networks.

Design vision - During a flood the house transforms occupants relocate upstairs while water enters the ground floor a concrete dado extends from the foundation

◦ this allows for easy cleaning post flood drinking water is concealed in a deep flood void storage walls can be turned around the access emergency supplies

Tailored Living bedrooms are downstairs other living spaces are upstairs

◦ most expensive belongings are raised above flood waters sunken concrete pontoon allows car to be be floated out of harms way green space for pets when garden is flooded walls act to filter debris entering garden


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Community Links timber shutters on the fist floor fold down like drawbridges to join neighbouring

balconies – this creates a continuous raised walkway to replace the flooded ground level walkway

neighbours are no longer isolated

No.2: Housing Masterplan – revolves around SUDS

Strengths Good master planning scheme based on an integrated approach to managing water at

the building, street and development levels


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Resistance for low level frequent floods and more major floods without much disruption to the community

Green open spaces are included to store and direct flood water away from properties Overall a viable scheme.

Weakness lack of access for cars and services

◦ with some adaptation this can be achieved

Sectional view – courtyard house & swale

Design vision close relationship between land use, drainage management and housing design focus on flood resistant housing houses, private open spaces and the street are designed to minimise flood damage

SUDS techniques permeable surfaces and swales along the front of houses connected to basins and

retention ponds single family dwellings with terrace house typology, back to back raised public footpath at first floor level along the rear

◦ becomes a safe access route during a flood landscaping to reduce quantity of surface run-off roof gardens rain-water harvesting systems

Additional resistance measures ground floor level is split by cut and fill of the site

◦ the front half is at 300mm (30cm) above ground ◦ the rear half is at 1200mm (120cm) above ground

only half the ground floor will be submerged during a major flood design to resist water entry at levels below 300mm (30cm)

◦ occupants have time to move valuables to higher ground kitchen located on the higher ground level at the rear raised door thresholds prevent low water entry engineering brick foundation walls

◦ proven ability to prevent water entry

Resilience Measures ceramic tile floor insulation is 'closed-cell board' fixed above the ground floor slab and on the internal


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faces of the external walls◦ boards are water resistant to an extent and their location facilitates easy

replacement if damaged by longer duration flooding.

No.3: Resistant & Resilient Design

Strengths This is a good example of design according the the premise that water will not enter

including attractive resilient construction Overall this is a well integrated, relatively inexpensive and practical design.

Weaknesses Features for access and evacuation are needed.

Design vision create a place that is safe, accessible, flood resilient and on the leading edge of

sustainable design a holistic approach to address flood mitigation and to incorporate energy efficiency an integrated water management system is included green features include:

◦ pedestrian path, cycle route, swales, water feature

External features white finished concrete clear glass veil of vertical timber fins concrete base that acts as a flood defence


Page A1-27

No.4: Amphibious House

Strengths concrete hull with prefabricated ponds dependant on an access road raised to first floor level

◦ more suitable to a sloping or water front site

Strengths concrete hull with prefabricated ponds dependant on an access road raised to first floor level

◦ more suitable to a sloping or water front site

Weaknesses concern related to water flows, depth and velocity

◦ trapped debris under the house could impact the foundation and structural integrity


Page A1-28

Floating Buildings theory is sound technology exists and has been tested

Design vision three discrete sections

◦ site-specific hull▪ a watertight concrete box

◦ two prefabricated elements for sleeping and living▪ a modular steel frame contains the sleeping areas – sunk into the hull▪ living spaces are wedge shaped boxes stacked on top of the hull▪ cantilevers over it at either end▪ clad in weathered zinc for a shipping container aesthetic

Additional features the hull rests on pile foundations in normal conditions the house becomes buoyant during a flood to the rear, extended piles form columns attached to the hull via steel collars

◦ this allows vertical movement with the rising and falling of water ◦ lateral movement is prevented


Page A1-29

REFERENCES

Allison, Ian. 2011. The copenhagen diagnosis: Updating the world on the latest climate science. Burlington, MA: Elsevier.

BC Ministry of Environment. January 2011. Climate Change Adaptation Guidelines for Sea Dikes and Coastal Flood Hazard Land Use. Accessed November 1, 2012. www.env.gov.bc.ca/wsd/public_safety/flood/pdfs_word/draft_policy_rev.pdf

City of Rotterdam. 2010. Connecting Delta Cities: sharing knowledge and working on adaptation to climate change.

City of Vancouver Climate Adaptation Strategy. 2012.

City of Vancouver Food-proofing policies. 2007.

Construction Industry Research and Information Association (CIRIA). Improving the flood resistance of your home – advice sheets.http://www.ciria.org.uk/flooding/advice_sheets.html

Environment Canada Weather warning service http://www.weatheroffice.gc.ca/warnings/warnings_e.html

Greater London Authority. 2005. Adapting to Climate Change: a Checklist for Development.

International Panel on Climate Change (IPCC). 2007. Summary for Policy Makers. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (eds) Solomon, S. et al.

Morris, Marya, and United States. Federal Emergency Management Agency. 1997. Subdivision design in flood hazard areas. Vol. no. 473. Chicago, IL: American Planning Association, Planning Advisory Service.

Norwich Union. 2008. Flood-proof houses for the future: A compendium of design. www.flooddesigncompetition.co.uk

RAB Consultants Ltd. Homeowners Guide to Flood Resilience: A Living Document.http://www.knowyourfloodrisk.co.uk/pdf/protection-guide.pdf

UK Environment Agency and Communities and Local Government. 2007. Improving the Flood Performance of New Buildings: Flood resilient construction.

UK Environment Agency and the Guildford Borough. 2010. Flood Risk Reduction Measures.


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http://www.knowyourfloodrisk.co.uk/pdf/protection-guide.pdfhttp://www.flooddesigncompetition.co.uk/http://www.weatheroffice.gc.ca/warnings/warnings_e.htmlhttp://www.ciria.org.uk/flooding/advice_sheets.html

APPENDIX 2 - PART A – AGREEMENT DETAILS – SAMPLE PROFESSIONAL SERVICES AGREEMENT

PS20130914 - Proponent Page A2-1

CITY OF VANCOUVER

PROFESSIONAL SERVICES AGREEMENT

REQUEST FOR QUOTATION (RFQ) PS20130914 – FLOOD-RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE

PART A - AGREEMENT DETAILS

BETWEEN:

CITY OF VANCOUVER 453 West 12th Avenue Vancouver, British Columbia V5Y 1V4 (the “City”)

OF THE FIRST PART

AND: [NAME OF CONSULTANT] [address of Consultant]

(the “Consultant”)

OF THE SECOND PART

BACKGROUND:

A. The City requires the professional services described below, and desires to engage the Consultant to perform the services.

B. The Consultant has agreed to perform the services in accordance with the terms and conditions contained in this Agreement.

1.0 PROJECT MANAGERS

1.1 The City’s Project Manager for this Agreement is as follows:

[NTD: Insert name, title, address, e-mail and telephone.]

1.2 The Consultant’s Project Manager for this Agreement is as follows:

[NTD: Insert name, title, address, e-mail and telephone.]



2.0 SERVICES

2.1 The “Services” will consist of the services described in the following documents (and those subsequently included upon the request or instruction of the City’s Project Manager pursuant to Part B, Section 3.0 - Changes to Scope of Service, if any):

2.2 All of which documents are now deemed to be attached to and form an integral part of this Agreement whether or not actually attached to this Agreement. In the event of any conflict or inconsistency, the terms of Part B - Professional Services Terms and Conditions and Part C - Defined Terms will be given priority, followed by the terms off this Part A - Agreement Details, followed by the above-noted documents, in the order set forth above.

3.0 DELIVERABLES/AGREEMENT PRICE

The following Table 1 describes each Deliverable and sets out the maximum fees and expenses for each Deliverable and is to be read in conjunction with Part B, Section 2.0 - Basis of Payment to Consultant.

Table 1

Deliverables Description Maximum Fees

Draft reviewed/revised flood-resilient construction primer


Summary document/table for public and staff quick reference

Final report and summary document

“Agreement Price” (Maximum Fees and Expenses) excluding GST

3.1 Pursuant to Part B, Section 2.2 - Hourly (or Daily) Rates/Unit Rates Fixed, the Consultant now confirms that the following hourly rates apply for the following Consultant’s Personnel:

Table 2

Team Members

Name/Title Area of Responsibility/

Description of Services Provided Hourly Rate



4.0 KEY PERSONNEL

Pursuant to Part B, Section 1.6 - Key Personnel, the following individuals are now designated “key personnel”:

Table 3 – Key Personnel

Name/Title Area of Responsibility/Description of Services Provided

[insert name] Consultant’s Project Manager

5.0 PROJECT SCHEDULE

Pursuant to Part B, Section 1.7 - Project Schedule, the following Project Schedule will apply to the Services:

Table 4 – Project Schedule

Deliverable Completion Deadline

Draft reviewed/revised flood-resilient construction primer November 15, 2013


November 15, 2013

Summary document/table for public and staff quick reference November 25, 2013

Final report and summary document December 2, 2013

6.0 CONFLICT OF INTEREST/LOBBYIST REGISTRATION DISCLOSURE

Pursuant to Part B, Section 17 - Conflict of Interest/Lobbyist Registration Disclosure, the Consultant has the following exceptions regarding conflict of interest or lobbyist registration:

This Agreement is between the City and the Consultant and consists of this Part A - Agreement Details, Part B - Professional Services Terms and Conditions and Part C - Defined Terms and any documents referred to in any of these sections. If there is any conflict between these sections, Part B - Professional Services Terms and Conditions and Part C - Defined Terms, will take precedence. The Consultant acknowledges that it has read and understands this Agreement.



AS EVIDENCE OF THE CITY’S AND THE CONSULTANT’S agreement to be legally bound by the terms of this Agreement, the City and the Consultant have signed where indicated below and delivered this Agreement to each other effective as of [insert month, day, year].

CITY OF VANCOUVER by its authorized signatory: [insert name], [insert job title] [LEGAL NAME OF CONSULTANT – to exactly match name on insurance, WorkSafeBC and business licence] by its authorized signatory(ies): [Name and Title] [Name and Title]

APPENDIX 2 - PART B – PROFESSIONAL SERVICES TERMS AND CONDITIONS - PROFESSIONAL SERVICES AGREEMENT


PART B - PROFESSIONAL SERVICES TERMS AND CONDITIONS

1.0 CONSULTANT'S SERVICES TO THE CITY

1.1 Defined Terms

Capitalized words and terms used in this Agreement have the meanings given to them in Part C - Defined Terms.

1.2 Effective Date / Term of Agreement

This Agreement will take effect and become legally binding on the parties once it is signed and delivered by both the City and the Consultant..

1.3 Provide Services

The Consultant now agrees to provide and be fully responsible for the Services.

1.4 No Contracting Out Without Consent

The Consultant will not engage sub-consultants or otherwise assign, sub-contract or let out as task work any part of the Services, unless the Consultant has obtained the prior written consent of the City’s Project Manager, which consent may be arbitrarily withheld.

1.5 Quality of Service

The Consultant represents and warrants that, it has the necessary skill, ability, experience, personnel and other resources to perform the Services, and that it will perform the Services:

(a) with the degree of care, skill and diligence normally applied in the performance of services of a similar nature and magnitude to the Services,

(b) in accordance with sound current professional practices,

(c) in conformance with the latest standards and codes prescribed by professional and regulatory bodies in the applicable profession, field or discipline, and

(d) in accordance with the requirements of this Agreement, and any requests or instructions of the City’s Project Manager made/given pursuant hereto.

1.6 Key Personnel

The Consultant will furnish all personnel required to perform the Services, and all such personnel will be competent and qualified to perform the Services. Where specific key personnel have been named as such in Part A, Section 4.0 – Key Personnel, such key personnel will not be replaced with other personnel without the prior written consent of the City’s Project Manager, which consent may be arbitrarily withheld.

1.7 Project Schedule

The Consultant will commence the Services promptly and will carry out the Services in accordance with the Project Schedule.



2.0 BASIS OF PAYMENT TO THE CONSULTANT

2.1 Maximum Fees and Expenses – Agreement Price

This Agreement is a “time and materials” contract subject to an upset price maximum. Accordingly, despite any other term of this Agreement (except for Part A, Section 3.0 – Deliverables/Agreement Price) the maximum fees and expenses payable by the City to the Consultant for the Services is the amount set out in Table 1 of Part A, Section 3.0 - Deliverables/Agreement Price (the “Agreement Price”).

2.2 Hourly (or Daily) Rates/Unit Rates Fixed

All hourly (or daily) rates and unit rates set out in this Agreement will remain fixed until the completion of the Services and may not be increased by the Consultant for any reason.

2.3 Basis of Payment

In consideration of the Services performed by the Consultant to the satisfaction of the City and in strict conformity with the terms of this Agreement, the City will pay the Consultant the fees and expenses set out in this Agreement, plus the GST, as applicable.

2.4 “Time and Materials” Agreement

Subject to the other terms of this Agreement, payment to the Consultant will be based on:

(a) hours worked by the Consultant’s Personnel in providing the Services multiplied by the applicable hourly charge-out rate for that personnel as set out in Table 2 of Part A, Section 3.0 - Deliverables/Agreement Price; and

(b) the direct out-of-pocket expenses necessarily incurred in providing the Services and expressly permitted to be charged separately under this Agreement.

2.5 Deliverable Price is Maximum

Despite anything to the contrary in this Agreement (except Part A, Section 3.0 – Deliverables/Agreement Price) the maximum fees and expenses to be paid by the City to the Consultant for each Deliverable will not exceed the amounts set out in Table 1 of Part A, Section 3.0 - Deliverables/Agreement Price for that Deliverable, and accordingly:

(a) where the aggregate of the time and materials utilized by the Consultant to deliver each Deliverable is less than the maximum amounts set out in Table 1 of Part A, Section 3.0 - Deliverables/Agreement Price, the City will only pay for the aggregate of the time and materials at the hourly (or daily) rates for fees and the unit rates for expenses;

(b) where the aggregate of the time and materials utilized by the Consultant to deliver each Deliverable exceeds the maximum amounts set out in Table 1 of Part A, Section 3.0 - Deliverables/Agreement Price for that Deliverable, the City will only pay the maximum fees and expenses amount set out there for that Deliverable; and



2.6 Services Obligations included in Agreement Price

The Agreement Price and maximum amounts of fees and expenses as set out in Table 1 of Part A, Section 3.0 - Deliverables/Agreement Price will in no way diminish the duties and obligations of the Consultant to provide the Services covered by this Agreement.

2.7 Sub-Consultant Services all-inclusive unless Change Order

Where the City and Consultant have expressly stated in Part A - Agreement Details (or by Change Order) that certain Services to be performed by a Sub-Consultant are to be paid for separately from the other Services, the City will reimburse the Consultant for payments made to such Sub-Consultant(s) at amounts equal to the actual payments made to that Sub-Consultant by the Consultant without any additions for overhead and profit.

2.8 Interim Invoices

The Consultant will, no later than the 25th of the month, provide to the City’s Project Manager a draft invoice with the attached detailed account of all charges, to be claimed by the Consultant for the current month. The City’s Project Manager shall review, raise any concerns with the Consultant within ten working days and, after settlement, if necessary, approve the draft invoice. The Consultant, if so requested, will meet with the City’s Project Manager to expedite and settle the draft invoice. The Consultant will submit the final invoice. as per the approved draft invoice, to the City of Vancouver, Attention: Accounts Payable, P.O. Box 7757, 349 West Georgia Street, Vancouver, BC, V6B 0L5, or by email to

Documents

REQUEST FOR QUOTATION (“RFQ”) No. PS20130914 FLOOD … · 2013. 9. 26. · REQUEST FOR QUOTATION No. PS20130914 FLOOD-RESILIENT CONSTRUCTION PRIMER REVIEW GUIDE INSTRUCTIONS TO