1 Barnsbury Terrace, London, N1 Structural Method Statement

1 Barnsbury Terrace, London, N1

Structural Method Statement Project no: 2498 November 2017

Page 2Project no: 2498 1 Barnsbury Terrace,

Contents

Revision Date Status

- 22-11-2017 Draft issue

A 01-12-2017 Final

Prepared By: Carolina C Lameiras-Colley

Checked By: Dave Heeley

Approved By: Dave Rayment

1 Introduction

2 The Project

3 The Site

3.1 Site Location

3.2 Site History

3.3 Geotechnical Data

3.4 Neighbouring Properties

4 The Proposed Development

4.1 Superstructure

4.2 Substructure

5 Construction Methodology

6 Surrounding Structures

Appendix

A Design Sketches

B Site Investigation Report


Introduction

Morph Structures were instructed by Lipton Plant Architects on behalf of the property owner, Dom and Louise Moule, to consider the structural aspects of the development of 1 Barnsbury Terrace, Islington and to produce a Structural Method Statement in support of the Planning Application process.

This report covers the work undertaken during the initial stage of the project. A description of the main elements of the structure is given, plus aspects of the construction methodology which has influenced the structural design.

The report was prepared by Carolina Lameiras-Colley and approved by Dave Rayment, MEng CEng MIStructE.

1


The project involves the redevelopment of 1 Barnsbury Terrace.

The proposal is to construct a single storey side extension on ground floor and to carry out a loft conversion within the current loft space to create a new habitual space.

At basement level, the existing cellar space to be enhanced by lowering the existing cellar by approximately 1.3m. New lightwells are to be created at the front of the property. The new single storey stepped level basement will be under the footprint of the extended building and will protrude further into part of the garden space.

The Project2

Front of the property


3.1 Site LocationThe site is located on the corner of Lofting Road and Barnsbury Terrace in Islington, North London.

The National Grid Reference for the site is TQ 30983 84198 (E530983, N184198). The ground level is generally flat.

3.2 Site HistoryThe earliest map available for the area dates back to 1851.

The old map shows that the site was mainly vegetation/ grassland in 1851. By 1874, a row of houses were built on this road.

Between 1874 - 1896, the row of houses seemed to have been demolished and new terraced houses were built. The site remained mostly unchanged from 1896 to present date.

The road was formerly known as Mount Pleasant. Between 1896-1972, the road name was converted to Barnsbury Terrace.

Upon reviewing the bomb maps from the Second World War, the area appears to have sustained no recorded damage.

3The Site

Aerial View of Site

Geotechnical Profile

1.5m Made Ground

1.2m Firm Brown Fissured clay

3.3Geotechnical DataPublished geotechnical maps from the British Geological Survey indicate that the local geological strata comprises of London Clay Formation which is of clay, silt and sand with no recorded superficial deposits.

The nearest borehole from the British Geological Survey shows the ground build up of approximately 300mm of made ground above 4.0m of firm fissured brown blue clay and before reaching stiff fissured blue clay . There was no water level recorded at the time.

A geotechnical investigation has been carried out on 9th November and confirmed the soil formation with approximately 1.5m of made ground with 1.2m of brown fissured clay before reaching London Clay. No ground water was encountered during the investigation.

Refer to Appendix B for full geotechnical investigation report

From the Environmental Agency, the site has no recorded flooding from rivers or the Sea. No recorded flooding from reservoirs and flooding from surface water is considered low.

Site Location

Old Map 1851

Old Map 1896

Stiff Fissured clay

Flood Risk Map from Rivers or the Sea / Reservoirs

Flood Risk Map from Surface Water


3The Site

3.4 Neighbouring Properties The site is located at the corner of Lofting Road and Barnsbury Terrace. The property shares a boundary with No. 2 Barnsbury Terrace on the Northern side. On the Southern side, the boundary is shared with 102-110 Lofting Road with a single storey masonry lock up garage by the front garden. The Western Boundary is shared with 112 Hemingford Road.

The existing building is a three storey end of Terrace property of traditional build of load bearing masonry and timber floor construction. A single storey cellar type basement currently occupies the front of the property.

Existing Site Constraints

Existing Structures

Boundary fence - Masonry

Existing Back Garden Spaces

Boundary fence - Timber


4.1 Superstructure LOFT CONVERSION

The proposal is convert existing loft space into a multi use space with access onto the existing roof at the rear of the property through proposed double doors.

The loft conversion will be formed by removing part of the existing roof and a new ridge beam will be installed spanning the full width onto the external walls. A new flat roof will be formed using timber joists spanning from the new ridge beam to the new load bearing timber stud wall with the new access onto the external space.

The existing internal loft joists may required to be strengthened, new timber joists can be used to enhance the floor to support new multi-use space loadings.

The existing flat roof structure will be exposed prior to construction to review the existing structure is adequate for new use loading. New timber joists can be used to enhance the floor to support new terrace loadings.

The external masonry walls on both sides will be raised to suit the new layout. It is envisaged that the new wall will be constructed using timber stud wall internally with cladding externally in accordance to the architects details. .

4The Proposed Development

Section from Architects visualisation

INTERNAL ALTERATIONS

The proposal is to remove the chimney stack at the rear of 1 Barnsbury Terrace, the retained chimney at the higher level will be re- supported using new steel beam spanning from the rear external wall to a new steel beam which will be installed between the roof joists.

The existing bay at the rear of the property will be demolished from lower ground floor to the underside of upper ground floor to form the new ground floor extension. The retained bay at the upper levels will be re-supported by a grillage of new steelworks on the upper ground floor level which will be supported on a combination of steel frame and padstones onto the existing external wall.

Internal alterations include the removal of an existing wall to form the new open plan space on lower ground floor. The retained wall above will be re-supported using steelwork spanning full width onto external walls.

New roof lights are introduced onto the staircase area, it is anticipated that the roof lights are formed by removal of existing timber joists and new timber joists to be doubled to form the new opening.

Refer to Appendix A for Structural Design Sketches


4.2 Substructure GROUND FLOOR

The ground floor slab will be of reinforced concrete construction, this will provide the propping to the top of the RC retaining wall. Additional steel beams to be installed to support the front of the existing property.

The openings of the proposed roof lights will be incorporated into the RC slab.

Where the ground floor level changes, the RC slab will form a step in slab and will also form the new support for the existing spine wall.

The chimney stack at the front room location will be re-supported with a new steel beam at ground floor.

NEW RETAINING WALL ALONG SHARED BOUNDARY

In order to form the new retaining wall along the boundary shared with No. 2 Barnsbury Terrace, the proposal is to mass concrete underpin the existing foundation to the depth below the formation level of the new basement slab. A new RC retaining wall will be constructed in front of the mass concrete underpins. The RC retaining wall has been designed to resist all lateral loading in the permanent case. Adequate support is at all times maintained by the contractors.

EXISTING MASONRY BUTTRESS ALONG THE SHARED BOUNDARY

Similar to the boundary on the North site, the existing foundation including the masonry buttress will be underpinned using mass concrete to the depth below the formation level of the new basement slab. A new RC retaining wall will then be constructed in front. The existing buttress is approximately 1.0m by 1.0m with a larger footing. The buttress may required to be underpinned in two phases. Needles to be used to temporary support the buttress until the underpin at the location is complete.

4The Proposed Development

Side to Side Temporary Propping to Existing Wall After Mass Concrete Underpinning

RC Retaining Wall Basement Box Construction

NEW BASEMENT UNDER GARDEN SPACE

The basement walls away from the shared boundary will be formed with reinforced concrete retaining wall. Due to the close proximity to the shared boundary fence, the new retaining wall will be formed in 1.0m strips similar to the underpinning process in a hit and miss sequence. The new RC slab at ground floor will be formed 1.0m below existing level, void former and soil will be used to make up the levels.

NEW LIGHTWELLS AT THE FRONT OF THE PROPERTY

Similar method will be used to form the proposed lightwells at the front of the property.

All the RC retaining walls have been designed to be propped by the new basement and ground floor slab with the exception of the RC retaining wall by the proposed lightwells at the front, they are designed as cantilever.

Further development will take place at the next stages to resolve the internal and external interface of the RC retaining wall.

Refer to Appendix A for Structural Design Sketches

Proposed Structural Layout

Proposed Roof-lights

Proposed Reinforced Retaining Wall

Mass Concrete Underpinning of Existing Foundation

P r o p o s e d lightwells

Extract from Basement Construction Section


The methodology set out below has been assumed for the purposes of undertaking the planning stage and is provided to demonstrate that the works can be executed with due consideration of the surrounding buildings.

SITE SET UP

•There is access to the site from Barnsbury Terrace only.

• A banksman will be present during deliveries and removals to ensure that there is no risk to pedestrians from these activities

•Construct site hoarding, entrance gates to provide protection to pedestrians from site activities.

•Provide a site survey of all Party Walls to record the condition prior to construction and monitor any movement occurring during the works.

•Terminate, protect or temporarily redirect services and drainage.

•Confirmation of existing structures prior to commencement of works.

SITE CLEARANCE

•Carefully clear vegetation and material from the site ensuring they are properly disposed of.

5Construction Methodology

CONSTRUCTION OF PERIMETER BASEMENT WALLS

•The existing boundary wall will be underpinned using mass concrete. The mass concrete underpin has been designed to transfer the vertical loads from the walls to the lower level.

•New reinforced retaining wall is to be constructed in front of the mass concrete underpins and the RC retaining walls have been designed to support the loads from the new ground floor slab and to resist the horizontal load from the soil and surcharge from the surroundings.

•The sequence of underpinning will be such that any given underpin will be completed, dry packed, and a minimum period of 48 hours lapsed before an adjacent excavation commenced to form another underpin.

•In the event that the existing foundations to the wall are found to be unstable, sacrificial steel jacks will be installed underneath the foundation to prop the bottom few courses of bricks. These steel jacks will be left in place and will be incorporated into the concrete stem.

•Lateral propping shall be provided to the rear of the excavation and to the sides of excavated working trench. Side faces of the excavation shall be propped using temporary trench sheeting or plywood, timber board and acrow props as appropriate. Non degradable sacrificial back shutter should be used to the rear face of the excavation. (I.e. cementitious boards, plank lintels, non compressible dense former)

•The access trench is excavated directly underneath the wall to be underpinned. The width of any base is individually assessed on site with due regard to the type and condition of the foundation and structural geometry above. The maximum width of any underpinning base will be 1000mm.

•Excavate using hand and compressed air tools removing spoil until the design depth is reached.

•Once the excavation is completed to the designed depth and length, The stratum at the proposed founding depth is confirmed as being appropriate by the structural engineer or building control.

•Shutter is then erected and concrete poured to form the underpinning base up to 75mm below the underside of the existing foundation.

•After 24 hours the temporary wall shutters are removed. The void between the top of the underpin base and underside of existing foundation will then be dry packed with a mixture of sharp sand and cement (ratio 3:1 sand:cement)

•Break off projecting bricks or concrete footing back to internal face of brick wall.

•A further 48 hours is allowed before the adjacent section can be excavated.

•Adjacent underpins shall be connected using dowel bars.

•Formation of the new RC retaining walls in the garden space and at the front to be formed. The maximum width of any RC retaining walls will be 1000mm.

•Once the underpin and the RC retaining walls at the rear and the front are complete, ensure all retained superstructures to be temporary propped prior to bulk excavation commencement

•Side to side lateral propping to be maintained throughout excavation.

•New reinforced concrete retaining wall can be formed once the excavation is complete.

•Cast new RC ground bearing slab, incorporating the new steelwork support for the front bay and the retained chimney stack.

CONSTRUCTION OF SUPERSTRUCTURE WORKS

•Install temporary support to all required areas prior to commencement of works.

•Construct padstones and Install new steelworks prior to the demolition of existing structures.

•Construct padstones and Install new steelworks and completed, Install new timber floor joists to complete loft extension

FOLLOW ON TRADES

The principal structural works are now complete and weather proofing the building and finishing trades can start.

CONSTRUCTION GENERALLY

The works are required to be undertaken in accordance with all statutory legislation relating to construction works.

The Contractor will be required to demonstrate a positive attitude and commitment toward minimising environmental disturbance to local residents and will be required to be registered with the Considerate Contractors Scheme.

Noise, dust and vibration will be controlled by employing Best Practicable Means (BPM) as prescribed in the following legislative documents and the approved code of practice BS 5228:

•The Control of Pollution Act 1972

•The Health & Safety at Work Act 1974

•The Environmental Protection Act 1990

•Construction (Design and Management) Regulations 1994

•The Clean Air Act 1993

General measures to be adopted by the Contractor to reduce noise, dust and vibration include:

•Erection of site hoarding to act as minor acoustic screen.

•Use of super silenced plant where feasible.

•Use of well-maintained modern plant.

•Site operatives to be well trained to ensure that noise minimisation and BPM’s are implemented.

•Effective noise and vibration monitoring to be implemented.

•Reducing the need to adopt percussive and vibrating machinery..

•Vehicles not to be left idling.

•Vehicles to be washed and cleaned effectively before leaving site.


The neighbouring property is assumed to be of traditional load bearing masonry with timber floor construction

Post-planning, as part of the party wall process, a more detailed structural inspection of the adjacent properties including internal inspections will be undertaken prior to completing any detailed designs.

PARTY WALL CONSIDERATIONS

The works comprise the excavation for a single storey basement within close proximity of adjacent properties. These works will fall under The Party Wall etc. Act 1996.

The structural scheme adopted has been designed with due regard to maintaining the structural stability and integrity of neighbouring buildings & structures and surrounding land. The method of construction has been developed to ensure that lateral deflections, and associated ground movements, are kept within acceptable limits during and post construction.

6Surrounding Structures

TRAFFIC LIGHT TRIGGER VALUE (mm) CONTRACTOR ACTION

Green <8 No action required

Amber 8-12 Notify the CA and Party Wall Surveyor(s). Increase frequency of monitoring. Implement contingency measures if movement continues.

Red >12 Notify the CA and the Party Wall Surveyor(s). Implement measures to cease movement and stop work.

Indicative Ground Movement Trigger Values

MONITORING OF NEIGHBOURING PROPERTIES

The category of damage to adjacent buildings, as classified under Burland et al, anticipated from the proposed construction of the new basement is expected to be category 1 or less . The Contractor will be required to monitor ground movements during the works to check the validity of the ground movement analysis and the performance of the temporary works and working methods. A ‘traffic light’ system of green, amber, red trigger values will be set with specific Contractor actions set against each trigger values.

The monitoring method is to be developed further during detailed design but may take the form of precise levelling, geospatial surveying, crack width gauges, strain gauges, inclinometers, or extensometers or a combination of these methods. The monitoring will be undertaken prior to demolition and continue through to completion of the structure.

Appendix A

Design Sketches

NOTES

LEGEND

CLIENT PROJECT DRAWING No. REVISION

SCALE DATE DRAWN CHECKED

REV DATE DESCRIPTION BY CHECKED

FOR INFORMATION ONLY

E [email protected]

W www.morphstructures.com

F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON

40 BOWLING GREEN LANE

TITLE

BARNSBURY TERRACEDOM & LOUIS MOULE

SPAN DIRECTION OF FLOOR

PROPOSED MASS CONCRETE (SECTION)

PROPOSED R.C CONCRETE

ASSUMED SITE BOUNDARY

BB CLC

P2

NOV '17

2498-MORPH-ZZ-B1-DR-S-1000

PROPOSED

BASEMENT

PLAN

1:50 @ A2

CLCBBP1 ISSUED FOR INFORMATION

C24 TIMBERS355 STEELWORKRC28/35 REINFORCED CONCRETEGEN 3 MASS CONCRETE

2. MATERIAL GRADES:

ENGINEERS AND ARCHITECTS DRAWINGS AND SPECIFICATIONS. 1. THIS DRAWING IS TO BE READ IN CONJUNCTION WITH ALL OTHER



IN 1.0m SECTIONSNEW R.C WALL TO BE CONSTRUCTED

A

5000

B 5000

C 5000

IN A HIT AND MISS SEQUENCEMASS CONCRETE UNDERPINNING

EXISTING FOUNDATION TOEMASS CONCRETE TOE TO MATCH

200mm THK RC SLAB

IN A HIT AND MISS SEQUENCEMASS CONCRETE UNDERPINNING

FOUNDATIONASSUMED EXISTING BUTTRESS

22.11.17

D

5001

CLCPFP2 ISSUED FOR INFORMATION

STEP

STEP

CONSTRUCTED IN 1.0m SECTIONSR.C RETAINING WALL TO BE

ARCHITECTS DETAILSCONCRETE STEPS TO

STEP IN BASEMENT SLAB

01.12.17

300mm

300mm

NOTES

LEGEND





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE


ROOF LIGHT TO ARCHITECTS DETAILS





250mm THK R.C SLAB

250mm THK R.C SLAB

STAIRCASE AND LANDING DETAILSREFER TO ARCHITECTS FOR

ROOF LIGHT TO ARCHITECTS DETAILSOPENING IN GROUND FLOOR SLAB

SLAB EDGE

250mm THK R.C SLABB1

B2

B2

B2

BB CLC

P2

NOV '17

2498-MORPH-ZZ-00-DR-S-1001

PROPOSED

PLAN

1:50 @ A2


GROUND FLOOR

NEW WALL TO ARCHITECTS DETAILS

UC COLUMN152 x 152 x 30

UC COLUMN152 x 152 x 30

STEP

STEP IN SLAB

RETAINED CHIMNEY STACKNEW BEAM TO SUPPORT

RC RETAINING WALL BELOW

ADJOINING PROPERTY

RESUPPORT FRONT BAY NEW BEAM ARRANGEMENT TO

DETAILSNEW LIGHTWELL TO ARCHITECTS

EXISTING MASONRY GARAGE

BA

RN

SB

UR

Y T

ER

RA

CE


2. MATERIAL GRADES:


C 5000

B 5000

A

5000

22.11.17


STEP

BELOW WITH UPSTANDRC RETAINING WALL

RC RETAINING WALL WITH UPSTAND

STEP IN SLAB

D

5001



01.12.17

NOTES

LEGEND





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE


FLOOR SPANASSUMED EXISTING

B4

B7

B7

B7

B7

B7

B7

PADSTONE

FLOOR SPANASSUMED EXISTING

TO MATCH EXISTINGDOUBLE UP TIMBER JOISTS TO TRIM SIZE NEW ROOF LIGHT TO ARCHITECTS DETAIL

BB CLC

P2

NOV '17

2498-MORPH-ZZ-00-DR-S-1002PLAN

1:50 @ A2

GROUND FLOOR






PROPOSED UPPER

B7

B3

B8

ROOF LIGHT TO ARCHITECTS DETAILS


2. MATERIAL GRADES:


22.11.17




01.12.17

NOTES

LEGEND





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE


SUPPORT EDGE OF NEW ROOF LIGHT2No 250 x 50 C24 TIMBER JOISTS TO

TIMBER JOISTS TO TRIM SIZE TO MATCH EXISTINGNEW ROOFLIGHT TO ARCHITECTS DETAIL DOUBLE UP

EXISTING CHIMNEY TO BE REMOVED

ASSUMED EXISTING FLOOR SPAN





BB CLC

P2

NOV '17


1:50 @ A2PROPOSED UPPER


FIRST FLOOR


2. MATERIAL GRADES:


22.11.17




01.12.17

NOTES

LEGEND





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE


ASSUMED EXISTING FLOOR SPAN

NEW TIMBER JOIST SPAN 250 x 50 C24 AT 400mm C/C

TO BE STRENGTHENED FOR PROPOSED TERRACEASSUMED EXISTING FLOOR SPAN MAY REQUIRED

B5

B5

LINTEL ABOVE

LINTEL ABOVE

TO MATCH EXISTINGDOUBLE UP TIMBER JOISTS TO TRIM SIZE NEW ROOF LIGHT TO ARCHITECTS DETAIL

NEW EXTERNAL WALL TO ARCHITECTS DETAILS

BB CLC

P2

NOV '17




SECOND FLOOR






2. MATERIAL GRADES:


NEW STAIRS TO ARCHITECTS DETAILS

22.11.17


LINTEL ABOVE

01.12.17



NOTES

LEGEND





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE


SPAN TO RETAINASSUMED EXISTING ROOF

PADSTONE

NEW TIMBER RAFTER 250 x 50 C24 AT 400mm C/C

BEAMRIDGE NEWB6

BB CLC

P2

NOV '17

2498-MORPH-ZZ-RF-DR-S-1005PLAN



ROOF






2. MATERIAL GRADES:


22.11.17

FOR RETAINED CHIMNEY STACKNEW BEAM ALLOW FOR RE-SUPPORT

DETAILSROOF EXTENSION TO ARCHITECTS NEW EXTERNAL WALL TO SUIT NEW


DETAILSROOF EXTENSION TO ARCHITECTS NEW EXTERNAL WALL TO SUIT NEW

DETAILSNEW GLAZING TO ARCHITECTS

SUPPORT NEW GLAZINGASSUME 2No TIMBER JOISTS TO

DOUBLE UP TIMBER JOISTS TO SUPPORT NEW GLAZING



01.12.17

NOTES





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE



SECTION

A-A

ASSUMED SLAB LEVEL

EXISTING MASONRY PARTY WALL

ASSUMED BOUNDARY LINEEXISTING CORBEL TO RETAIN

ASSUMED BOUNDARY LINE

NEW SLABTO BE RESUPPORTED ONTO EXISTING INTERNAL PARTITION

WALLEXISTING MASONRY PARTY

250mm THK RC SLAB

DETAILSFINISHES TO ARCHITECTS

BEARING SLAB200mm THK RC GROUND

50mm BLINDINGBUILT IN 1m SECTIONMASS CONCRETE UNDERPINNING

BUILT IN 1m SECTIONMASS CONCRETE UNDERPINNING

STACK TOS-TBCB2 TO RESUPPORT CHIMNEY

AFTER UNDERPINNINGCAREFULLY DEMOLISHED EXISTING CORBEL TO BE

DETAILSFINISHES TO ARCHITECTS WATERPROOFING AND

WALL250mm RC RETAINING

SECTION

B-B

ASSUMED GARDEN LEVEL

ASSUMED BOUNDARY LINEASSUMED BOUNDARY LINE

DETAILSFINISHES TO ARCHITECTS NEW 250mm THK RC SLAB

ASSUMED SLAB LEVEL

50mm BLINDINGBUILT IN 1m SECTIONMASS CONCRETE UNDERPINNING

BEARING SLAB200mm THK RC GROUND


WALL250mm RC RETAINING

AFTER UNDERPINNINGCAREFULLY DEMOLISHED EXISTING CORBEL TO BE

PF CL

P2

NOV '17

2498-MORPH-ZZ-ZZ-DR-S-5000

1:50 @ A2

WELL RAMMED INSHARPSAND DRY PACK MIN 75mm 1:3 CEMENT :

22.11.17

CLCPFP2 ISSUED FOR INFORMATIONSECTION

C-C

ASSUMED BOUNDARY LINEASSUMED BOUNDARY LINE

BUILT IN 1m SECTIONMASS CONCRETE UNDERPINNING


SLABNEW 250mm THK RC

DETAILSREINSTATED AS PER ARCHITECTS EXISTING GARDEN FENCE WALL TO BE

CONSTRUCTED IN 1.0m SECTIONSGROUND BEARING SLAB TO BE 250mm THK NEW WALL RC

TOP OF NEW RC WALLWALL TO BE REINSTATED ON EXISTING GARDEN MASONRY

TOC = TBC

VOID FORMER

ARCHITECTS DETAILSEXTERNAL FINISHES TO

WALL 1.0 m HIGH CANTILEVER RETAINING

SECTIONS & DETAILS

01.12.17

NOTES





E [email protected]


F +44(0)20 7837 7612

T +44(0)20 7415 7032

EC1R 0NE

LONDON


TITLE



SECTION

D-D

PF CL

P1

NOV '17

2498-MORPH-ZZ-ZZ-DR-S-5001

1:50 @ A2

SECTION D - D

VOID FORMER

DETAILSROOF LIGHT TO ARCHITECTS

DETAILSROOF LIGHT TO ARCHITECTS

50mm BINDING

STEP IN SLAB

01.12.17

TERRACEBARNSBURY

Appendix B

Site Investigation Report

40 Bowling Green LaneLondonEC1R 0NE

T: 020 7415 7032F: 020 7837 [email protected]

Documents

1 Barnsbury Terrace, London, N1 Structural Method Statement