TV1 8

Attachment 2

Alterative Use assessment

Seismic advice – Beca

STRUCTURAL

TEMPLE VIEW BLOCK PLANTGYMNASIUM & MEN'S SHED OPTION

CONCEPT DESIGN 7/10/2020

Prepared for

THE CHURCH OF JESUS CHRIST OF

LATTER-DAY SAINTS

TEMPLE VIEW BLOCK PLANT - GYMNASIUM & MEN'S SHED OPTION - SUMMARYSE-K000

7/10/2020

NTS (A3)

5923514

Walker Community Architects has prepared a redevelopment option for the former Block Plant. The proposed usage is acombined gymnasium and "men's shed".

We have reviewed the proposal for the alterations that would be expected from an engineering perspective. The purpose ofthese drawings is convey our recommendations.

INTRODUCTION

SE-K000 INTRODUCTIONSE-K005 STRUCTURAL ALTERATIONSSE-K006 INTERNAL WALL REMOVAL5920191-SK02 67%NBS SEISMIC RETROFIT CONCEPT - FLOOR PLAN5920191-SK03 67%NBS SEISMIC RETROFIT CONCEPT - BUILDING SECTIONS & DETAILS

STRUCTURAL SKETCH LIST

The proposed redevelopment involves a change in use under the Building Act, and therefore Council will need to be satisfiedthat the building, in its new use, will comply as nearly as is reasonably practicable with every provision of the Building Codethat relates to the following:

- means of escape from fire, protection of other property, sanitary facilities, structural performance and fire rating performance- access and facilities for people with disabilities (to the extent required by Section 118 of the Building Act)

The building has previously been the subject of a Seismic Assessment which rated the performance as 40-50% of the newbuilding standard (NBS). Based on our experience, and considering the risk profile of the new use, we would expect HamiltonCouncil would require the building be strengthened to achieve at least a minimum seismic performance of 67%NBS.

In addition to the above seismic performance requirement, any structural alterations will need to comply with the Building Codeand we would also expect the suspended floor to require a fire rated lining to the soffit.

CHANGE IN USE

A retrofit concept has previously been prepared for the former Block Plant to improve the seismic performance to 67%of the new building standard. This concept is attached and these works are expected to be required as part of theproposed redevelopment.

The objective of the retrofit concept is to mitigate each of the deficiencies identified in the Seismic Assessment. It isnoted very few new walls are required, however each wall requires an improved connection to the roof. Themezzanine floor also requires an improved wall connection.

In addition to the scope of work outlined above, a plywood ceiling diaphragm is also required (as noted on SE-K005). This can be installed in conjunction with the new ceilings. The purpose of the plywood diaphragm is to mitigateagainst the proposed removal of several existing internal partitions which currently help brace the building.

SEISMIC RETROFIT

The attached drawings identify the structural alterations required to achieve the proposed interior layout. This includesthe following works:

- the removal of several internal masonry walls (some of these walls are original but many are not)- removal of an elevated area of slab to enable contiguous use of the space- the addition of lintel beams to re-support the roof where internal load-bearing walls are removed- the creation of new window/door openings where indicated- a new complying timber stair to the mezzanine and infilling of the existing stair penetration- a limited number of new load-bearing and internal bracing walls- levelling screeds to make good slab- a short retaining wall to the rear to marry the site into the surrounding grading contours

ALTERATIONS

Aside from the structural scope, costing allowances will need to be made for new building services to suit the newusage including electrical, lighting, drainage, ventilation/cooling, etc.

An allowance will also be required to upgrade the existing in-ground infrastructure including power supply, sanitaryconnections and stormwater.

SERVICING

JOB TITLE:

SKETCH TITLE:

DATE:

SCALE:

DRAWN:

VERIFIED:

REASON FOR ISSUE:

SOURCE OF BACKGROUND:

JOB No.:

SKETCH No.:

REV:

P L E AS E P R I N T I N C O L O U R

APPROVED:

BLOCK PLANT

7.10.2020

STRUCTURAL ALTERATIONS - GYM & MEN'S SHED(67%NBS)

N.T.S.

-

ASB

5923514

SE-K005

ASB

FEASIBILITY

WALKER ARCH CONCEPT

B

Structural Notes

Refer to attacheddrawing 5920191-SK02& SK03 (from BecaSeismic report dated 6March 2020) for seismicstrengthening scopewhich will be required(67%NBS).

The markups on thisdrawing depict structuralscope additional to theseismic strengthening.

For (E) wallsdemolished referSE-K006.

Provide (N) ceilingdiaphragms throughoutcomprising 16mm ply ontimber framing. Lineunderside with GIB asrequired for finish.

Allow for new compliantbuilding services,including electrical,drainage, etc.

Allow to upgradeexisting stormwater andconnections. Newexterior pavement,planters, etc.

Allow for make-good,access, temporaryworks, etc.

Fire rate soffit withGIB linings (30mins)

New compliant barrierand timber framed stair

Denotes (N) Window or Door Penetration

Procedure: Install props and core for needles to providetemporary support. Over-cut 200 on all sides. Form (N)lintel, cill, and sides using fitted/matched part-blocks andreinforce. Break into surrounding masonry in twolocations on each side and install hooked rebar "dowels".Grout fill entire assembly.

(E) three out of fourposts to remainunder. Fire rate withcoating or box out

Demolish (E) elevatedslabs, lower slabs, wallsand heavy RC hopper wallsincluding adjoining exteriorwall indicated. (N) Stripfoundations, walls andSlabs.

Risk Notes

Water-tightness andinsulation properties ofexterior walls mayrequire further treatment.

Insulate roof.

Allow for localised spotrepair of aged rooftimbers (est. 10%)

Allow for levelling screedto existing slab in allareas (insulation under?)

Denotes (N) Enlarged Door Penetration

Procedure: As above for (N) windows.

Denotes (N) Steel Lintel Beam

Demolish (E) internalwalls. (N) Shortinternal walls tosupport lintel beamswith new foundations

Remove (E)generator plinthand overheadlifting beam

Denotes (N) Window in (E) opening

Prepare opening for new glazing.

(N) floor infill to (E)stair opening

(N) short cantileveredretaining wall inreinforced masonry onan RC strip footing. Allow for field drainbehind.

Demolish (E) minor internalpartitions, heavy central wall.

(N) Reinforced masonry wall on (N) stripfoundation to re-support first flooradjacent (N) stair opening

Cut down height ofexisting masonry wall.Form new reinforcedbond course to top

Infill (E) opening

Infill (E) opening

Denotes (E) Walls to be Demolished. Refer SK-K005 forwalls to be re-constructed.

JOB TITLE:

SKETCH TITLE:

DATE:

SCALE:

DRAWN:

VERIFIED:

REASON FOR ISSUE:

SOURCE OF BACKGROUND:

JOB No.:

SKETCH No.:

REV:

P L E AS E P R I N T I N C O L O U R

APPROVED:

BLOCK PLANT

7.10.2020

STRUCTURAL ALTERATIONS - GYM & MEN'S SHED(67%NBS)

N.T.S.

-

ASB

5923514

SE-K006

ASB

FEASIBILITY

WALKER ARCH CONCEPT

B

(E) two posts toremain

Cut down height ofexisting masonry wall

(E) three out of fourposts to remain. Firerate with coating orbox out

No. AppdRevision By Chk Date

Drawing Originator:

DO NOT SCALE

* Refer to Revision 1 for Original Signature

Scale (A1)

Scale (A3)Reduced

Dwg Check

Dsg Verifier

Drawn

Original DesignConstruction*

Date

Approved For Client: Project:

IF IN DOUBT ASK.

Title:

Drawing No.

Discipline

Docu

ment

No.

Rev.

Drawing Plotted: 26 Sep 2011 4:30 p.m.

DRAW

ING2

.DW

GBL

UEBE

AM

STRUCTURAL

5920191-SK02 A

FORMER BLOCK PLANT

67%NBS RETROFIT CONCEPTFLOOR PLAN

CHURCH OF JESUS CHRIST OF LATTER-DAY SAINTS

ACD

A SEISMIC ASSESSMENT - UPDATE ACD ASB ASB 03-2020

NOTES: 1. ALL DIMENSIONS SHOULD BE CONFIRMED ON SITE.

2. REMOVE ANY RUST FROM (E) EXPOSEDREINFORCING STEEL BACK TO BRIGHT STEEL.

3. FOR EXISTING EXPOSED BARS, REMOVE RUST ASPER NOTE 3 AND PAINT WITH SIKA FERROGARD 903(OR APPROVED EQUIVILENT).

4. REPAIR CONCRETE TO BE SIKA MONOTOP-438R (ORAPPROVED EQUIVALENT) FLOWABLE GROUT. FORLARGE AREAS USE 30MPa CONCRETE (REFERSUPPLIER FOR APPROPRIATE MIX DESIGN).

5. ALL ANCHORS TO (E) CONCRETE/MASONRYASSUMED TO BE DRILL AND EPOXY WITH HILTI RE-500V3 OR RAMSET EPCON C8 OR APPROVED EQUIVALENT.

6. ALL MASONRY FIXINGS TO BE MIDHEIGHT IN BLOCKCOURSE (I.E. AVOID MORTAR JOINTS)

(E) DAMAGED CONCRETE LINTEL TO BEREPAIRED. ALLOW TO BREAK BACK

CONCRETE TO CONFIRMREINFORCEMENT CONDITION, REFER

NOTES 2-4 FOR REPAIR CONCRETE.

(N) FULL DEPTH NOGS.ALLOW TO INSTALL M12 ANCHORS AT 600 CRSBETWEEN FOUR MASONRY WALLS AND EDGE

TIMBER TRIMMERS. REFER DETAIL C, SK03

(E) JOISTS SHOWNINDICATIVELY

SK032

(N) FULL DEPTH NOGS. FIX TO TIMBERTOP PLATE AND JOISTS.CONFIRM (E) TOP PLATE FIXINGS. ALLOWTO INSTALL M12 ANCHORS AT 1200 CRSIF (E) FIXINGS ARE INADEQUATE.REFER SECTION 2 ON SK03.

CONFIRM FIXINGS OF PERPENDICULARRAFTERS AND TOP PLATE FIXINGS.ALLOW TO INSTALL BRACKETS TO EACHRAFTER, REFER SECTION 1 ON SK03.

SIM

SIMSK032

SK031

SK031

--1

--1

-1

SK021

FIRST FLOOR ROOFPLAN

NOT FOR CONSTRUCTIONPRELIMINARY

IMPROVE CONNECTION BETWEENTIMBER DIAPHRAGM AND FOUR

SUPPORTING WALLS/STEEL BEAM.SEE DETAILS A AND B SK03

INSTALL (N) FULL DEPTHNOGGING/TRIMMER WITH M12

ANCHORS AT 1200 CRS (SIM. DETAIL A SK03)

CONFIRM FIXINGS OF PERPENDICULARRAFTERS AND TOP PLATE FIXINGS.

ALLOW TO INSTALL BRACKETS TO EACHRAFTER, REFER SECTION 1 ON SK03.

TO PREVENT FOUNDATION UNDERMINING ENSURE SURROUNDING SOIL IS AUGMENTED BATTERED TO MIN. 3:1 SLOPE TO 100mm BELOW FLOOR SLAB HEIGHT ALONG GRIDLINE 4 & M.

(E) JOISTS SHOWNINDICATIVELY

(E) JOISTS SHOWNINDICATIVELY

SK032

SK032

SK032

No. AppdRevision By Chk Date

Drawing Originator:

DO NOT SCALE

* Refer to Revision 1 for Original Signature

Scale (A1)

Scale (A3)Reduced

Dwg Check

Dsg Verifier

Drawn

Original DesignConstruction*

Date

Approved For Client: Project:

IF IN DOUBT ASK.

Title:

Drawing No.

Discipline

Docu

ment

No.

Rev.

Drawing Plotted: 26 Sep 2011 4:30 p.m.

DRAW

ING2

.DW

GBL

UEBE

AM

STRUCTURAL

5920191-SK03 A

FORMER BLOCK PLANT

67%NBS RETROFIT CONCEPTBUILDING SECTIONS AND DETAILS

CHURCH OF JESUS CHRIST OF LATTER-DAY SAINTS

ACD

A SEISMIC ASSESSMENT - UPDATE ACD ASB ASB 03-2020

SECTIONN.T.S.

1-

SECTIONN.T.S.

2-

DETAILN.T.S.

A-

DETAILN.T.S.

B-

DETAILN.T.S.

C-

(N) FULL DEPTH NOGS AT 600 CRS (TWO BAYS ONLY)WELL NAILED TO (E) TIMBER RAFTERS AND SKEW NAILTO UNDERSIDE OF (E) TIMBER SARKING.SIM SECTION 2, BUT ON ONE SIDE ONLY.

(N) M12 ANCHOR AT 600CRS.SIM. SECTION 2 BUT ON ONESIDE ONLY.

(E) EDGE TIMBER TRIMMER

(E) TIMBER SARKING

(E) TIMBER RAFTERS

(N) FULL DEPTH TIMBERNOGGING AT 1200CRS (ONEBAY EACH SIDE OF WALLONLY). WELL NAILED TO (E)TIMBER RAFTERS ANDSKEW NAIL TO UNDERSIDEOF (E) TIMBER SARKING.

(N) M12 ANCHORS AT 600CRS. STAGGER EACH SIDE.

(E) MASONRY WALL

(E) TIMBER SARKING

(E) TIMBER RAFTER

(E) MASONRY WALL

(N) LUMBERLOK BOWMAC BRACKET (I.E.TYPE B354) TO EVERY RAFTER.2-M6 COACH SCREWS TO RAFTER AND1-M12 ANCHOR TO SECOND COURSE OFBLOCKS.

(E) STEEL BEAM

(E) PLYWOOD FLOORING ABOVE

REPLACE PARTIAL DEPTH NOGS WITH FULL DEPTHTIMBER NOGS. INSTALL M12 ANCHORS AT 600 CRS TO(E) MASONRY. FIX (N) NOGS TO (E) TIMBER JOISTSWITH LUMBERLOK CPC-40 (FULLY NAILED) EACH SIDE,AND NAIL NOGS TO TIMBER FLOORING ABOVE.

(E) TIMBER JOISTS(SEATED ON STEEL BEAM FLANGE

REPLACE PARTIAL DEPTH NOGS WITH FULL DEPTH TIMBERNOGS.INSTALL M12 ANCHOR AT 600CRS AND FIX TO (E) TIMBERJOISTS WITH A LUMBERLOK CPC-40 EACH SIDE (FULLY NAILED),AND NAIL NOGS TO TIMBER FLOORING ABOVE.

(N) M12 ANCHOR TO MASONRY WALLAT 600 CRS

(E) TIMBER JOISTS(SEATED ON STEEL BEAM FLANGE

NOT FOR CONSTRUCTIONPRELIMINARY

*SIM: NOGS TO ONE SIDE OF WALL ONLY.

NOTES: 1. REFER TO SK02 FOR NOTES.

(N) M12 ANCHOR TO MASONRY WALLAT 600 CRS.