SECTION O3450

Metal Stud Crete⑧ (MSC) SITE CAST CONCRETE WALL PANELS

1.O SUBJECT

Engineer, fabricate and insta11 MSC concrete panels to withstand design loads within limits and under

COnditions indicated. Panel design shall confom with ICC ESR-25 1 1 and meet the requlrementS Of

the current Intemational Building Code.

1. 1　　GENERAL

A.　System Description:

1.　MSC panel fabrication shall include al1 1abor, materials and equipment necessary to

manufacture the panels as shown by the Contract Documents.

2.　MSC panel insta11ation sha11 include all labor, materials and equipment necessary for

the installation of panels as shown by the Contract Documents.

3.　The MSC composite panels consist of light-gauge Steel studs and a reinforced concrete

facing or topping on one side of the studs, With the MSC metal comector providing a

Shear-flow comection between the steel studs and the concrete. MSC is a patented

ICC approved steel comector strip used to transfer shear stresses in composite wall

Panel systems.

4.　The Panel Manufacturer shall fumish all comection hardware embedded in the panels.

The fumishing and placement of the hardware in the cast-in-Place (i.e., Slab, footings)

COnCrete Will be the responsibility of the General Contractor.

5・ Items and openmgS Which are to be cast into the MSC panels for other trades shall be

PrOVided to the Panel Manufa・Cturer, With instructions, in a timely mamer in order not

to disrupt or delay production. All such embeds, hardware and exact location of sane

Shall be fully defined in contract drawings.

B.

C.

Engineering Responsibility: A qualified professional engineer shall prepare design calcula-

tions and other structural data for MSC concrete units.

Submittals: In addition to product data, manufacturer’s instructions, COnCrete mix designs,

material test reports, and material certificates, Submit the following:

1.　Samples:

a.　Submit preliminary sample’apPrOXimately 1 2” x 1 2", rePreSentative offinished

exposed face.

b.　Prior to commencement of manufacture, Submit production sample, apPrOXi-

mately 4’x 4’, for final approval of coIor and texture.

Shop and Erection Drawings: Submit one (1) reproducible set and three (3) blueline

SetS Showing:

a.　Material spec誼cations.

b.　FIoor plan identifying location of panels.

C.　FIoor plan identifying location of pre-ereCtion attachments (i.e., CaSt-in-Place

embeds and pre-Welds) to support structure (if applicable).

d・　Elevations identifying location of panels and their comections.

Section O3450 Meta看Stud Crete⑪ (MSC)

Site Cast Concrete Wall Panels03450-O 1

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e.　Details as necessary to describe relationship of panels to a句acent material.

f Details of panel comections.

g.　Description of a11 hardware cast into panels, Sent loose to the job site, and cast

into or attached to supporting structure (if applical)1e).

h.　Elevations and sections of typical panels showing:

( 1 )　Geometry and finish

(2)　Thickness of face

(3)　Reinforcement material and layout

(4)　Li飾ng and erection hardware sizes and locations

(5)　Embeds w皿piece marks and their locations (ifapplicable)

Mix Designs: Submit all mix designs for approval. Mix designs sha11 be prepared by a

qualified empIoyee of the concrete supplier.

D.

E.

F.

Fabricator Qual脆cations: Regularly engaged for at least five (5) years in fabrication of pan-

els similar to those required on this pr句ect.

ProfessionaI Engineer Qualifications: A professional engineer who is lega11y authorized to

PraCtice in the jurisdiction where PrQject is Iocated and who is experienced in providing engl-

neermg Services of the kind indicated.

Quality Assurance:1.　　Full-Scale Panel:

a.　After standard samples are accepted for coIor and text皿e, PrOduce full-SCale

Panel that meets design requlrementS. This panel shall be viewed and approved

by the Architect,

b.　The full-SCale panel shall be representative of standard quality for site cast panel

WOrk, When accepted by Architect.

C.　Incorporate餌1-SCale panel into work after keeping panel at site cast location

for checking purposes.

1.2　　MATERIALS

A.　Stee量Studs: Where the MSC comector is used, Steel studs in composite panels must be rec-

Ognized in a current ICC ES evaluation report. Physical and section properties are found in

the evaluation report on the steel stud. Minimun steel thickness and yield strength for the

Studs must comply with Table l ofICC ESR-251 1

B.

C.

MSC Connector: The MSC comector transfers shear stresses between the concrete facing and

the light-gauge Steel stud・ The strip is fastened to the web ofthe stud and the flange of the

track. The strip comector with stud frane attached is then embedded into the concrete facing.

The strip is fわricated from No. 1 8 gauge thick (0.047 inch [1. 19 mm]) steel, COmPlying either

With ASTM A 653, Grade 33, Or With SAM A 570, Grade 33. The galvanized coating complies

with ASTM A 924.

Concrete: The concrete facing or topping is nomal-Weight concrete having a minimun com-

PreSSive strength of 2,500 pounds per square inch (17.2 Mpa) at 28 days. Concrete materialsmust comply with Section 1 903 ofthe Code.

Section O3450 MetaI Stud Crete⑪ (MSC)

Site Ca§t Concrete Wall Panels

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Steel Reinforcement: Concrete panels must be reinforced in accordance with the structural

design, and the steel reinforcement must comply with the Code.

Screws: The MSC comector must be attached to the stud using galvanized tek type selfLdrill-

mg, Self-tapPing sheet metal screws of a manufa′Cturer Or brand recognized in a c皿ent ICC

ES report. The screws must comply with the standards for the allowable pullout and shear

loads described in those reports. The design engmeer Shall calculate the shear, Pullout and

tension requlrementS and select a screw that has confimed the capacity for those values.

1. 3　　FABRICATION

A.　Panel Manufacturer shall not proceed with frbrication ofpanels prior to receiving the approved

Set Of Shop Drawings and the Architect, s acceptance of submitted Samples.

B.　Batching of Concrete sha11 be in accordance with approved Mix Design(S).

C.　　For血S:

1.　Foms for panels shall be rigid and constructed ofmaterials that will result in宜nished

PrOducts confoming to the pro乱es, dimensions and tolerances indicated by this Sec-

tion, the Contract Documents and the reviewed Shop Drawings・

2.　　Construct forms to withstand vibration method selected.

3.　Release agents shall be applied and used according to manufacturer’s instructions.

D ・　Concreting:

1.　Convey concrete from the mixer to place of final deposit by methods, Which wi11 pre-

Vent SeParation, Segregation or loss of material.

2.　Consolidate a11 concrete in the fom to minimize unintentional pour lines, honeycomb-

mg Or entrapPed air on vertical surfaces.

E.　Curing: Procedures su範cient to insure specified concrete strength of a11 panels must be em-

PIoyed. Stripping of a panel shall not occur until concrete strength is su飾cient to prevent

CraCking or breaking of the panel.

F・　Manufacturing ToIerances:

1.　Overall height and width ofpanels measured at the face exposed to view:

a.　10’or less: ±1/8"

b.　10’to 20’:十1/8’’,-3/16’’

C.　　20’to 40,: ±l/4,,

d.　　Each add,1 10’: ±1/16"

2.　Overall height and width ofpanels measured at the face not exposed to view:

a.　10’or less:土1/4"

b.　10’to 20’:二l/4’’,-3/8’,

C.　　20’to 40’:土3/8,,

d.　　Each add’1 10’:士1/8"

3.　Variation from square or designed skew (difference in length oftwo diagonal measure-

ments): 1/8” per 6’or l/2” total, Whichever is greater.

4.　Bowing: Bowing shall not exceed L/360 unless it can be shown that the member can

meet erection tolerances usmg COmeCtion a句ustments.

Section O3450 Metal Stud Crete⑩ (MSC)

Site Cast Concrete Wa重l Panels

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5.　Length and widih ofblockouts and openings within one (1) panel: ±1/4”.

6.　Location of window openmg Within panel:土1/4’’.

7.　Location of blockouts other than window openmgS:土3/8”.

8.　Waapage: Maximun pemissible warpage of one comer out of the plane of the other

three shall be l/1 6” per foot distance fi.om the nearest a句acent comer.

9.　Location of bearing comections: ± 1/4”.

10.　Location ofembeds and inserts other than bearing comections:士1/2”.

Panel Identi範cation:

1.　Mark each panel to correspond to identi丘cation mark on Shop Drawings for panel lo-

cation.

2.　Mark each panel with casting date.

Panel Finish and Approval: Panels and approved Sanples sha11 be viewed side by side from

a distance of 20’when comparing texture and coIor. Panels that do not reasonably match血e

COIor and texture ofthe approved sanple(S), the dimensional tolerances, Or industry standards

may be r句ected at the option ofthe Architect ifthey camot be satisfactorily corrected.

1.4　　EXECUTION

A.

B.

C.

Product Transportation and Handling:

1.　Handle and transport panels in a position consistent with their shape and design in order

to avoid excessive stresses or damage.

2.　Lift or support panels only at the points shown on the Shop Drawings.

3.　Support panels during shipment on non-Staining shock-absorbing material as needed to

PreVent damage.

Pre-Installation Responsibility:

l ・　General Contractor’s Responsibility:

a・　The General Contractor shall provide the contro=ayout grid lines, including

grades, at eaCh building elevation on each floor recelVmg Panels.

b・　The General Contractor shall provide true, 1evel, and clean support and attach-

ment surfaces.

C.　The General Contractor sha11 provide for the accurate (土1/2” in all directions)

Placement and aligrment of comection hardware on the structure.

d.　The General Contractor shall confirm that the dimensions and tolerances of the

StruCture allows for proper installation of the panels.

Erector’s Responsibility: Prior to installation ofthe panels, nOtify the General Contrac-

tor of any discrepancies discovered which affect the work under this Contract. Com-

mencement of insta11ation does not constitute acceptance of the structure・

Erection:

1.　Unloading Areas and Access: Clear all-Weather unloading areas and access roadways

around the building and in the building (where appropriate) shall be provided and main-

tained by the General Contractor so that the erection equlPment for the panels may

OPerate under their own power.

Safety Aspects: The General Contractor shall provide all required tra飾c controIs, bar-

ricades, Waming lights and/or signs to insure a safe installation.

Setting: Panels shall be lifted with suitable捕ing devices at points provided by the

Panel Manufacturer to prevent excessive stresses or danage to the panels.

Section O3450 Metal Stud Crete⑧ (MSC)

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Temporary Supports and Bracing: The erector shall provide temporary supports and

bracing as required to maintain position, Stability and aligment皿til panels are per-

manently comected.

Tolerances ofErected Panels shall be as listed below:

a.　Plant location from building grid datum: ±1/2”

b.　Top elevation from nominal top elevation:

(1)　Exposedindividualpanel: ±1/4”

(2)　Non-eXPOSed individual panel:土1/2”

(3)　Exposed relative to a句acentpanel: 1/4”

(4)　Non-eXPOSed relative to a星iacent panel: 1/2”

C.　Maximum plunb variation over height of structure or lOO feet, Whichever is

less:1,,

d・　Plumb in any lO ft. ofelement height: 1/4”

e.　Maximunjog in aligrment ofmatching edges: 1/4”

f Joint width (govems over joint taper):

(1)　Panel dimension less than 20’:土1/4"

(2)　Panel dimeusion over 20’: ±3/8"

g.　Joint taper maximun: 3/8”

h.　Jointtaper in lO ft: 1/4”

i・　Maximun jog in aligrment ofmatching faces: 1/4”

j.　Differential bowing as erected between a句acent member of same design: 1/4”

6.　　Final Cormection of Panels to Structure:

a・　Panels sha11 be attached to the structure as shown on the Engineered Drawings.

b.　All modifications made to details shown on Engineered Drawings shall be sub-

m誼ed for review.

D・ Job site Storage) Handling and Protection:

1 ・　Erector shall be responsible for the repair ofdamage to panels that is caused by its own

2.　After panels are installed in their final positions, the General Contractor shall be re-

SPOnSible for their protection.

3.　The General Contractor shall be responsible for the repair ofany damage to the panels

CauSed by someone other than the Panel Manufacturer.

E.　Patches and Repairs:

1.　Patching of panels, When required, Sha11 be perfomed to the Architect,s satisfaction

and consistent with industry standards.

2.　Repairs shall be sound, Pemanent and flush with a句acent surfa,Ce.

3.　From a distance of20’a11 repalrS muSt be ofcoIor and texture matching a句oining sur-

faces and showing no apparent line ofdemarcation between original and repaired work.

F.　Cleaning:

l ・　Cleaning methods shall be approved by Panel Manufacturer.

2・　Erector shall clean erection marks from panels upon erection’When exposed to view.

Section O3450 Metal Stud Crete⑱ (MSC)

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3.　Use care to prevent damage to panel surfaces and to a句acent materials.

4.　Surface must be thoroughly rinsed with clean water immediately after using cleaner.

5.　At completion ofthe prQject, General Contractor shall be responsible for final cleaning

and wash down of building.

Sea看er and/or Anti-Gra飾ti (Where used):

1.　Seal exposed panel surfaces, Where indicated on Contract Drawings, With one (l) coat

Of sealer in accordance with product manufacturer’s recommendations.

2.　Surfa・CeS tO be free of dirt, dust and other foreign material immediately prior to sealer

application.

3.　Patches or other work on panel surfaces, Which have removed sealer, Shall be resealed

by the responsible party.

Inspection and Acceptance: Immediately after erection is completed, final inspection and

acceptance of the erected panels shall be made by the Architect and General Contractor to

Verify confomance with plans and speci角cations. In cases where panel installation is phased,

Panels shall be inspected and approved in phases.

I.　Warranty: All lal)Or and materials under the Panel Manufacturer’s Contract shall be warranted

by the Panel Manufacturer for a period ofone (1) year following final approval ofthe panel by

the Architect.

*** END SECTION ***

CBSI co岬eSI鵬BUII.DENG SYSTEMS, ENC

180 So Lake Ave #205 Pasadena Ca 91101

0鉦ce: [ 818 ] 6064703

Ce批(818) 606-4703

WWW. metalcrete. com

E-Mail: Paul@metalcrete.com

Section O3450 Metal Stud Crete⑱ (MSC)

Site Cast Concrete Wall Panels03450-06

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