05 50 00 - metal fabrications.pdf

7/21/2019 05 50 00 - METAL FABRICATIONS.pdf

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MINISTRY OF HOUSINGWestern Sector Projects

Sitework & Infrastructure

OMRANIA and ASSOCIATES Project Specification

METAL FABRICATIONS SECTION 05 50 00 - 1

SECTION 05 50 00

METAL FABRICATIONS

PART 1: GENERAL

1.01 SECTION INCLUDES

A. Metal fabrications including, but not limited to the following:

1. Shelf and relieving angles.

2. Miscellaneous steel framing and structural steel supports not indicated on structural

drawings but required for the support of work by other trades.

3. Wheel guards.

4. Pipe bollards.

5. Corner guards.

6. Column guards.

7. Doors and frames; steel channel frames for overhead doors.

8. Wire mesh guards.

9. Supports for equipment and lights.

10.

Steel ladders and safety cages.

11.Stair nosings.

12.Supports for ceiling hung partitions.

13.Miscellaneous metal trim.

14.Wall brackets for monitors and cameras.

15.Manufactured column covers.

B. Light gauge metal framing for gypsum board partitions, ceilings and furring, including, but not

limited to steel studs, tracks, runner channels, bridging and furring channels, is specified in

Section 09 21 16.

1.02 RELATED SECTIONS

A. Section 03 30 00 Cast In Place Concrete.

B. Section 04 20 00 Unit Masonry.

C. Section 05 52 00 Metal Railings.

D. Section 05 53 00 Gratings and Floor Plates.

E. Section 09 21 16 Gypsum Assemblies.

F. Section 09 90 00 Painting & Coating.


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1.03 REFERENCES

A. AAMA 603.8 American Architectural Manufacturers Associations - Performance

Requirements and Test Procedures for Pigmented Organic Coatings

on Extruded Aluminum.

B. AAMA 605.2 Specification for High Performance Organic Coatings on

Architectural Extrusions and Panels.

C. AAMA 606.1 Specifications and Inspection Methods for Integral Color Anodic

Finishes for Architectural Aluminum.

D. AAMA 607.1 Specifications and Inspection Methods for Clear Anodic Finishes for

Architectural Aluminum.

E. AAMA 608.1 Specification and Inspection Methods for Electrolytically Deposited

Color Anodic Finishes for Architectural Aluminum.

F. ANSI A 14.3 Ladders, Fixed, Safety Requirements.

G. ASTM A 36 Standard Specification for Carbon Structural Steel.

H. ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-

Coated, Welded and Seamless.

I. ASTM A 123 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on

Iron and Steel Products.

J. ASTM A 153 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel

Hardware.

K. ASTM A 167 Standard Specification for Stainless and Heat-Resisting Chromium-

Nickel Steel Plate, Sheet, and Strip.

L. ASTM A 276 Standard Specification for Stainless Steel Bars and Shapes.

M. ASTM A 283 Standard Specification for Low and Intermediate Tensile Strength

Carbon Steel Plates.

N. ASTM A 307 Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI

Tensile Strength.

O.

ASTM A 480 M Standard Specification for General Requirements for Flat-RolledStainless and Heat-Resisting Steel Plate, Sheet, and Strip.

P. ASTM A 484 M Standard Specification for General Requirements for Stainless Steel

Bars, Billets, and Forgings.

Q. ASTM A 500 Standard Specification for Cold-Formed Welded and Seamless

Carbon Steel Structural Tubing in Rounds and Shapes.

R. ASTM A 501 Standard Specification for Hot-Formed Welded and Seamless Carbon

Steel Structural Tubing.

S.

ASTM A 653 Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) orZinc-Iron Alloy-Coated (Galvannealed) by the Hot-Dip Process.


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T. ASTM A 666 Standard Specification for Annealed or Cold-Worked Austenitic

Stainless Steel Sheet, Strip, Plate, and Flat Bar.

U. ASTM A 786 Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-

Strength Low-Alloy, and Alloy Steel Floor Plates.

V. ASTM A 955 Standard Specification for Deformed and Plain Stainless Steel Bars

for Concrete Reinforcement.

W. ASTM A1008 Standard Specification for Steel, Sheet, Cold-Rolled, Carbon,

Structural, High-Strength Low-Alloy and High-Strength Low-Alloy

with Improved Formability.

X. ASTM A1011 Standard Specification for Steel, Sheet and Strip, Hot-Rolled, Carbon,

Structural, High-Strength Low-Alloy and High-Strength Low-Alloy

with Improved Formability.

Y.

ASTM B 26 Standard Specification for Aluminum-Alloy Sand Castings.

Z. ASTM B 85 Standard Specification for Aluminum-Alloy Die Castings.

AA. ASTM B 177 Standard Guide for Chromium Electroplating on Steel for Engineering

Use.

BB. ASTM B 209 Standard Specification for Aluminum and Aluminum-Alloy Sheet and

Plate.

CC. ASTM B 210M Standard Specification for Aluminum and Aluminum-Alloy Drawn

Seamless Tubes [Metric].

DD. ASTM B 211M Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod,

and Wire [Metric].

EE. ASTM B 221M Standard Specification for Aluminum and Aluminum-Alloy Extruded

Bars, Rods, Wire, Profiles, and Tubes [Metric].

FF. ASTM C1002 Standard Specification for Steel Self-Piercing Tapping Screws for the

Application of Gypsum Panel Products or Metal Plaster Bases to

Wood Studs or Steel Studs.

GG. ASTM F 593 Standard Specification for Stainless Steel Bolts, Hex Cap Screws, and

Studs.

HH. ASTM F 594 Standard Specification for Stainless Steel Nuts.

II. AWS A 2.0 Standard Welding Symbols.

JJ. AWS D 1.1 Structural Welding Code.

KK. AWS D 1.2 Structural Welding Code Sheet Steel

LL. AWS D 1.3 Structural Welding Code - Aluminum

MM. SSPC Society of Protective Coatings - Steel Structures Painting Manual.

NN. SSPC SP 1 Solvent Cleaning.

OO. SSPC SP 10 Near-White Blast Cleaning.


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PP. SSPC Paint 20 Zinc-Rich Primers (Type I Inorganic and Type II Organic).

QQ. NAAMM The National Association of Architectural Metal Manufacturers

Metal Finishes Manual.

RR.

NAAMM Metal Bar Grating Manual.

SS. NAAMM Metal Products Outline Manual.

TT. TT P 645A Federal Specification for Primer, Paint, Zinc Chromate, Alkyd Type.

UU. SS C 153C Type 1 Federal Specification for Cement, Bituminous, Plastic.

1.04 SUBMITTALS

A. Comply with Section 01300.

B.

Product Data: Submit copies of manufacturer's latest published literature for materialsspecified herein for approval, and obtain approval before materials are fabricated and delivered

to the site.

C. Shop Drawings: Showing locations of work in the project, elevations and profiles. Indicate

materials sizes, shapes, thicknesses, sizes and locations of structural sub-frames and

reinforcing, location and installation requirements for fasteners and anchors and joints and

connections to other work. Welding shall be indicated using AWS symbols. Coordinate with

other metal work and all other structures and materials.

D. Calculations: Design calculations prepared by a qualified engineer experienced in the design of

metal fabrications of the type required for the project.

E.

Samples: Samples of materials specified herein shall be submitted for approval and approval

obtained before materials are delivered to the site.

1.05 QUALITY ASSURANCE

A. Materials and work shall conform to the latest edition of reference standards specified herein

and to applicable codes and requirements of local authorities having jurisdiction

B. Qualify welding processes and welding operators in accordance with AWS D 1.1, D 1.2 and D

1.3 as applicable.

C. Structural Performance: Design, engineer, fabricate and install the following metal fabrications

to withstand applicable structural loads without exceeding the allowable design working stressof the materials involved, including anchors and connections. Comply with the Performance

Criteria specified hereinafter.

D. Conflicting Requirements: In the event of conflict between pertinent codes and regulations and

the requirements of the referenced standards or this Specification, the provisions of the more

stringent shall govern.

E. Design cold-formed framing to comply with ASCE 7-02 and Uniform Building Code:

1. Design Load for Exterior Wall Assembly: Not less than 146 kg/m2.

2.

Increase size of individual members, including anchorage, or reinforce to resist loadswithout undue deflection.


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F. Maximum Horizontal Deflection at Midspan:

1. At Ceramic Tile: 10 mm or L/600 of span based on moment of inertia of stud cross section

only, whichever is less.

2.

Increase size of individual members, including anchorage, or reinforce to resist loads

without undue deflection.

G. Sloped Sills: Size to resist wind loads plus anticipated live loads of 195 kg/m2, but not less than

1.5 mm.

H. Interior Locations Indicated as Structural Steel Stud: Size to resist anticipated loads, but not

less than 0.9 mm unless otherwise indicated.

I. Uplift Pressures: Design and construct exterior metal framing and soffit assembly to withstand

upward pressures.

J.

Differential Movement: Design and construct wall system to accommodate anticipatedmovement indicated herein without damage or deterioration to studs or wallboards and without

buckling, opening of joints, and cracking.

K. Certifications: Work of this Section shall be performed under the direct supervision of a

registered Professional Engineer.

1.06 QUALIFICATIONS

A. Fabricator Qualifications: Firm experienced in successfully producing metal fabrications

similar to those indicated for the project, with sufficient production capacity to produce

required units without causing delay in the work.

B. Installer Qualifications: Arrange for installation of metal fabrications specified in this Section

by the same firm that fabricated them.

1.07 DELIVERY, STORAGE AND HANDLING

A. Exercise proper care in the handling of work so as not to injure finished surfaces and take

proper precautions to protect the work from damage after it is in place.

B. Deliver materials to the job site ready for use, and fabricate in as large sections and assemblies

as practical. Assemblies shall be identical to submitted and reviewed shop drawings, samples

and certificates.

C.

Store materials under cover in a dry and clean location off the ground. Take every precaution

not to damage or mar prime coats or galvanizing. Remove materials which are damaged or

otherwise not suitable for installation from the job site and replace with acceptable materials at

no additional cost.

1.08 PROJECT CONDITIONS

A. Check actual locations of walls and other construction to which metal fabrication must fit, by

accurate field measurements before fabrication. Show recorded measurements on final shop

drawings and coordinate fabrication schedule with construction progress to avoid delay of

work.


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1.09 PERFORMANCE CRITERIA

A. Railings and Guardrails: Design and construct to withstand a 91 kg load applied at any point,

downward or horizontally or the simultaneous application of a lateral force of 74 kg/m and a

vertical force of 149 kg/m, both applied at the top of the railing, the more stringentrequirements governing.

B. Ship Ladders: Design stringers and rungs to carry a uniform live load of 433 kg/m2 and a

moving concentrated load of 305 kg (loads not to act simultaneously).

C. Steel Ladders: Provide steel ladders as shown, designed and constructed to support a live load

of 76 kg per rung, complete with supporting brackets, stringers and rungs.

D. High Build Urethane Finish Coat: Color as selected. Apply to the respective dry film

thickness specified; as recommended by painting system supplier.

E. Other finishes as specified.

PART 2: PRODUCTS

2.01 PRODUCTS

A. All products shall be selected to provide maximum corrosion protection against severe

environment condition.

B. Stair Nosing for Cast-in-place Concrete Stairs -1 Piece: Abrasive nosing for installation during

placement of cast-in-place concrete stairs. Cast aluminum with embedded abrasive granules

and cross-hatched surface; concealed anchors:

1. Protect embedded aluminum surfaces with a heavy coating of factory applied clear lacquer,

and cover exposed surfaces with factory applied heavy tape for protection during

construction.

2. Size: Approximately 75 mm deep by full length of tread, unless otherwise indicated. Stop

ends 75 mm from ends of tread, unless otherwise indicated.

C. Stair Nosing for Cast-in-place Concrete Stairs - 2 Piece: Sub-channel for installation during

concrete placement and abrasive tread plate for installation in final stages of construction.

1.

Factory install temporary protective board in sub-channel for protection duringconstruction. Seal ends of sub-channel using heavy duty tape to eliminate concrete

infiltration and staining. Construct sub-channels and abrasive carrying plates of extruded

aluminum with mill finish.

2. Include concealed concrete anchors and tread plate securing screws. Protect embedded

items with heavy coating of factory applied clear lacquer.

D. Gate Spring Pivot Hinge: Surface mounted, malleable iron, with anti-friction bearing, allowing

spring tension adjustment after installation.


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E. Steel Ladders: Unless otherwise indicated fabricate steel ladders as follows:

1.

Stringers (Side rails): 75 mm by steel bars with eased edges.

2. Rungs: 19 mm diameter smooth steel rods at 300 mm on center.

3. Brackets: 75 x 10 x 275 mm bent steel plate at not more than 1200 mm on center.

4. Center line of rungs 175 mm from wall.

5. Extend stringers 1067 mm above top rung and return to wall.

6. Width: 450 mm between stringers.

F. Ladder Safety Cages: Fabricate ladder safety cages in compliance with ANSI A 14.3 and as

follows.

1. Primary hoops: Steel bars, 8 x 100 mm for top, bottom, and for cages longer than 6 m,

intermediate hoops not more than 6 m on center.

2. Secondary intermediate hoops: Steel bars, 8 x 50 mm, secured to each hoop, spaced 1200

mm on center between primary hoops.

3. Vertical bars: Steel bars, 8 x 50 mm, secured to each hoop, spaced approximately 225 mm

on center.

4. Fasten assembled cages to ladder rails and adjacent construction as indicated. Coordinate

special fastening requirements to adjacent construction with other contractors in time for

incorporation into work.

2.02 MATERIALS

A. Structural Steel Shapes: ASTM A 36.

B. Steel Plates: ASTM A 283 Grade C.

C. Rolled Steel Floor Plates: ASTM A 786.

D. Steel Bars for Gratings: ASTM A 569 or ASTM A 36.

E. Cold-Formed Steel Tubing: ASTM A 500, Grade A, unless otherwise indicated or required for

design loading.

F. Hot-Formed Steel Tubing: ASTM A 501.

G. For exterior installations and where indicated, provide hot-dip galvanized coating per ASTM A

53.

H. Cold-Rolled Uncoated Steel Sheet: ASTM A 1008.

I. Galvanized Steel Sheet: Commercial quality ASTM A 653, G90 galvanized coating

designation unless otherwise indicated.

J.

Steel Pipe: ASTM A 53, Schedule 40.

K. Stainless Steel Bars: ASTM A 276, Type 302, or 304.

L. Stainless Steel Plate: ASTM A 167, Type 302, or 304.


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M. Stainless Steel Fasteners: ASTM F 593, Type 302, or 304.

N. Aluminum Extruded Bars and Shapes: ASTM B 221, alloys as 6061-T 6 or 6063-T 6 for

bearing bars of gratings and shapes, 6061-T 1 for grating cross bars.

O.

Applied Coatings Interior Ferrous Metal Primer: As recommended by paint system

manufacturer.

P. Galvanizing Repair Paint: Zinc rich paint for repairing galvanized surfaces and field welds.

Q. Dielectric Separator: As recommended by paint, protection system supplier.

R. Shop Galvanizing: Hot-dip galvanize all exterior ferrous metals fabrications and all steel

gratings. Comply with the following requirements for galvanized items.

1. Hot-Dip Galvanizing: ASTM A 123, Table 1.

2.

Hot-Dip Galvanizing Steel Sheet: ASTM A 653.

3. Galvanizing Coating on Iron and Steel Hardware: ASTM A 153, Table 1.

4. Galvanized Coating on Assembled Steel Products: ASTM A 123, Table 1.

5. Galvanize after fabrication.

S. Provide RAL polyester powder coatings where indicated.

T. For Exterior Dunnage: 2 Coat System Aluminum Mastic Primer. Compatible with finish coats

of paint of the respective dry film thickness (DFT) specified as recommended by paint system

supplier. High Build Urethane Finish Coat: Color as selected. Apply to the respective dry

film thickness specified, as recommended by painting system supplier.

U. Mechanical Finishes: As shown for the respective units and matching the reviewed samples.

Remove scratches, abrasions, dents, die markings and other defects prior to finishing

operations. Perform this work in addition to finish treatment specified. Comply with

NAAMM "Metal Finishes Manual" for finish designations and application recommendations

unless otherwise specified.

V. Stainless Steel Exposed: No. 6 (satin directional polish).

W. Stainless Steel Concealed: Mill Finished with a clear acrylic lacquer.

X.

Aluminum: Concealed finishes shall be mill finish.

2.03 FABRICATION

A. Metal Fabrications shall be of the design, gauge, dimensions and to locations indicated and as

required for work shown. Metal Fabrications and finishes shall be first class in every particular

and in accordance with trade practice. Insofar as practicable, fabrication, assembly and fitting

of the work shall be executed in the shop with the various parts or assemblies ready for erection

at the project site. Work that cannot be shop assembled shall be given a trial fit at the shop to

ensure a proper and expeditious field assembly.

B. In the event that shop-fabricated miscellaneous metal items do not fit the field condition, the

item shall be returned to the shop for correction, including regalvanizing or priming whererequired.


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C. Shear, saw and punch metal accurately, cleanly, sharply and free of burrs, without deforming

adjacent surfaces or metals. Flame cutting shall be permitted only if cut edges are ground back

to clean, smooth edges.

D.

Ease exposed edges to a radius of approximately 0.8 mm, unless otherwise indicated. Formbent-metal corners to smallest radius possible without causing grain separation or otherwise

impairing work.

E. Weld corners and seams continuously to comply with AWS recommendation and the

following:

1. Form exposed connections with hairline joints, flush and smooth, using concealed

fasteners. Use exposed fasteners of type indicated or, if not indicated, Phillips flat-head

(countersunk) screws or bolts. Locate joints where least conspicuous.

2. Provide for anchorage of type indicated; coordinate with supporting structure. Fabricate

and space anchoring devices to provide adequate support for intended use.

F. Rough Hardware:

1. Furnish bent or otherwise custom fabricated bolts, plates, anchors, hangers, dowels and

other miscellaneous steel and iron shapes as required for framing and supporting

woodwork, and for anchoring or securing woodwork to concrete or other structures.

2. Fabricate items to sizes, shapes and dimensions required. Furnish malleable-iron washers

for heads and nuts which bear on wood structural connections; elsewhere, furnish steel

washers.

G. Coordination: Accurately cut, fit, drill and tap work of this section to accommodate and fit

work of other trades. Furnish or obtain, as applicable, templates and drawings to or fromapplicable trades for proper coordination of this work.

H. Shop Finishes:

1. Unless otherwise specified herein, concealed aluminum surfaces may be provided with a

mill finish.

2. Exposed aluminum (saddles) shall be provided with manufacturer's standard non-slip

finish.

I. Exterior Work: Allow for thermal movement resulting from temperature change (range) of 49o

C in the design, fabrication and installation of installed metal assemblies to prevent buckling,opening up of joints and overstressing of welds and fasteners. Base design calculations on

actual surface temperatures of metals due to both solar heat gain and nighttime re-radiation heat

loss. Fabricate joints that will be exposed to weather in a manner to exclude water or provide

weep holes where water may accumulate.

2.04 SHOP PAINTING

A. Shop paint ferrous and non-ferrous miscellaneous metals. Painting shall be done in dry

weather or under cover, and steel or iron surfaces shall be free from moisture or frost. No

materials shall be shipped or delivered until the shop coat has dried. Shop paint all

miscellaneous metals except the following:

1. Galvanized items.

2. Surfaces and edges to be field welded.


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3. Stainless steel items.

4. Items embedded in concrete, masonry, mortar or grout.

B.

Remove oil, grease and similar contaminants in accordance with SSPC SP 1 "SolventCleaning", prior to any additional surface preparation specified.

C. Clean and prepare metal surfaces before applying shop coat. Remove rust and mill scale in

accordance with SSPC SP 3 "Power Tool Cleaning", unless more stringent preparation is

required by the paint manufacturer.

D. Immediately after surface preparation, apply primer in accordance with manufacturer's

instructions. Use painting methods which will result in full coverage and dry film thickness

specified.

E. Apply one shop coat of primer to fabricated metal items. Touchup marred and abraded

surfaces with the specified paint.

F. Aluminum and Other Nonferrous Metals: Clean and apply one shop coat of dielectric

separator on surfaces which will come in contact with masonry, concrete, or plaster or will be

fastened to a dissimilar metal other than stainless steel.

G. Repaint areas of shop coat damaged during handling or installation with paint similar to that

applied in the shop.

H. Surface Preparation and Painting for Exterior Dunnage.

1. Clean all surfaces not otherwise specified in accordance with SSPC Surface Preparation

Specification No. 3, Power Tool Cleaning. Remove all loose paint.

2. Cleaning shall be done immediately prior to painting. Apply paint within 4 hours after

cleaning and before rust-bloom occurs on exposed steel surfaces.

3. Remove oil, grease and similar contaminants in accordance with SSPC SP 1 "Solvent

Cleaning", in addition to any preparation specified herein.

4. Immediately after surface preparation, apply paint in accordance with manufacturer's

instructions. Use painting methods which will result in full coverage and dry film

thickness specified.

2.05

FABRICATION OF SPECIFIC ITEMS

A. Shelf and Relieving Angles (not otherwise indicated on structural steel Drawings):

1. Fabricate shelf and relieving angles from steel angles of sizes indicated. Provide slotted

holes to receive 20 mm bolts, spaced not more than 150 mm from ends and not more than

600 mm on concrete, unless otherwise indicated.

2. For cavity walls, provide vertical channel brackets to support shelf-relieving angles from

backup masonry and concrete. Align expansion joints in angles with indicated expansion

joints in cavity wall exterior wythe.

3.

Hot-dip galvanized shelf angles supporting exterior work.


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B. Miscellaneous Steel and Structural Steel (not otherwise indicated on structural steel Drawings):

1.

Furnish and install steel framing, posts, bracing, brackets, columns, beams, girders, plates,angles, channels, closures, brackets and miscellaneous steel indicated on the drawings or

described in this specification.

2. Miscellaneous steel and structural steel shall include required support steel for the work of

this Section, and for the work of other sections.

3. Steel members shall be of such shapes, sizes and details indicated on the Drawings or as

required to suit the condition and shall be provided with necessary supports and reinforcing

such as hangers, braces, struts, clip angles, anchors, bolts, nuts, welds, etc., as required to

properly support and rigidly fasten and anchor same in place and to steel, concrete,

masonry and other connecting and adjoining work.

4.

Equip units with integrally welded anchors for casting into concrete or building into

masonry. Furnish inserts if units must be installed after concrete is placed. Space anchors

600 mm on center and provide minimum anchor units of 32 x 7.5 x 200 mm steel straps.

5. Steel conforming to ASTM A 36 and the "Specifications for Design, Fabrication, and

Erection of Structural Steel for Buildings" of the American Institute of Steel Construction.

C. Pipe Bollards:

1. Fabricate pipe bollards from Schedule 80 steel pipe. Cap bollards with 7.5 mm minimum

thickness steel base plate.

2.

Fabricate sleeves for bollard anchorage from steel pipe with 7.5 mm thick steel platewelded to bottom of sleeve.

D. Corner Guards: Fabricate of 100 x 100 x 9.5 mm steel angles of height indicated, with steel

strap anchors welded to internal corner 600 mm on centers.

E. Column Guards: Cover the perimeters of indicated columns with 7.5 mm bent steel plate, to

the height shown, having steel strap anchors welded to internal faces and continuous welds,

ground smooth at vertical joints.

F. Vehicular Wheel Guards: Fabricate of ductile iron with provisions for embedment in concrete

substrates and wall anchorage.

G. Structural Steel Door Frames for Overhead/Coiling Doors and Shutters:

1. Fabricate steel door frames from structural shapes and bars of size and to dimensions

indicated, fully welded together, with 16 mm by 40 mm steel bar stops, unless otherwise

indicated. Plug weld built-up members and continuously weld exposed joints. Secure

removable stops to frame with countersunk machine screws, uniformly spaced at not more

than 250 mm on centers. Reinforce frames and drill and tap as required to accept finish

hardware.

2. Provide steel strap anchors for securing door frames into adjoining concrete or masonry,

using 3.2 x 50 mm straps of the length required for minimum 200 mm embedment, unless

otherwise indicated. Weld anchors to frame jambs no more than 600 mm from bothbottom and head of frame and space anchors not more than 760 mm apart.


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K. Wall and Floor Specialties, Sleeves and Slots:

1. Sleeves shall be of Schedule 40 steel pipe with informal diameter 50 mm larger than o.d. of

pipe (including insulation, if any) to be accommodated. Sleeves shall project 15 mm on

each side of finished wall, unless otherwise indicated. Provide rectangular 7.5 mm steelplate collar at center, continuously welded to the perimeter of the sleeve and 150 mm wider

than the outside diameter.

2. Slots in slabs shall be 2.7 mm steel sheet, galvanized of dimensions indicated, with strap

anchors welded in place not more than 300 mm on centers.

L. Floor Opening Frames: Construct of 3.5 mm bent steel plate, full depth of slab, projecting 76

mm above finished floor, with welded corners and steel anchor strap on each side.

M. Trench Drains:

1. Provide trench frame with grated cover made of heavy duty ductile iron, sizes as shown on

the Drawings. Assembly shall have asphalt coating.

2. Grate shall have milled horizontal fitting surfaces.

3. Provide end pieces as required to close framing at ends.

N. Wire Mesh Specialties:

1. Wire Mesh Storage Partitions: Provide wire mesh partitions of dimensions and locations as

shown. Unless otherwise shown, provide 40 mm diamond mesh, 3.5 mm wire, secured

into standard channel frame and intermediate crossbars. Provide doors of same

construction as partition with a lock panel, locking mechanism, lockset and other finish

hardware as required.

2. Wire Mesh Guards and Closures: Provide wire mesh partitions of dimensions and

locations as shown. Unless otherwise shown, provide 40 mm diamond mesh, 3.5 mm wire,

secured into standard channel frame and intermediate crossbars.

PART 3: EXECUTION

3.01 EXAMINATION

A. Examine conditions at the job site where work of this Section is to be performed to ensure

proper arrangement and fit of the work. Start of work implies acceptance of job site conditions.

3.02 PREPARATION

A. Examine the Contract Documents in order to ensure the completeness of the work required

under this Section.

B. Verify measurements and dimensions at the job site and cooperate in the coordination and

scheduling of the work of this Section with the work of related trades, with particular attention

given to the installation of items embedded in concrete and masonry so as not to delay job

progress.

C. Provide templates as required to related trade for location of support and anchorage items.

D.

Dissimilar Materials: Isolate aluminum from masonry, concrete, wood and dissimilar metalsby coating with heavy-bodied bituminous paint or by using a non-absorbent gasket. Fasteners

shall be selected to prevent galvanic action.


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3.03 INSTALLATION

A. Install work of this section square, plumb, straight, true to line or radius, accurately fitted and

located, with flush tight hairline joints (except as indicated otherwise or to allow for thermal

movement). Provide attachment devices as required for secure and rigid installation.

B. Exposed joints shall be close fitting, and bolts and screws, where exposed, shall be cut off flush

with nuts or other adjacent metal. Cutting, drilling, punching and tapping required for the

installation and attachment of other work to miscellaneous metal work, except where specified

in connection with work under other sections, shall be performed as required.

C. Metal work built-in with concrete or masonry shall be formed for anchorage, or be provided

with suitable anchors, expansion shields or other anchoring devices shown on the Drawings or

required. Such metal work shall be furnished in ample time for setting and securing in place.

Wherever possible, fixings shall be built into concrete.

D.

Where indicated, install miscellaneous metal items in sleeves (furnished under this section)embedded in concrete with setting grout specified herein.

E. Unless otherwise indicated, joints shall be as strong and rigid as adjoining sections. Welding

shall be continuous along entire line of contact, except where spot welding is indicated or

permitted. Where exposed, welds shall be ground smooth. Where bolted or riveted

connections are indicated, such connections may be welded at the Contractor's option.

F. Where welding is required, it shall conform to requirements for shielded metal arc welding of

the Standard Code for Arc and Gas Welding of the American Welding Society. Exposed welds

shall be flush and ground smooth.

G. Threaded connections shall be made up tight so that threads are entirely concealed. Abutting

bars shall be so shouldered and headed, doweled and pinned. Small bars shall pass through

larger bars and be pinned. Rivet, bolts and screw heads shall be flat and countersunk in

exposed work and elsewhere as required. Removable members shall be carefully machined

and fitted and secured, by means of screws or bolts of proper size and approved spacing.

H. Bolts, brackets, sleeves and other items embedded in concrete shall be galvanized.

I. Except where built-in fixings cannot be used, Metal Fabrications may be fastened to concrete

with expansion bolts and to hollow block with toggle bolts. Fastening to wood plugs in

concrete or masonry shall not be permitted. Holes for plugs or bolts shall be drilled to the

exact diameter of the plug or bolt, using a percussion drill for concrete and a rotary drill for

masonry. Screws shall be threaded full length to the head of the screw.

J. Provide for adjustments of miscellaneous metal items, with particular attention given to

miscellaneous steel supporting the work of other sections, as required during the construction

process.

K. Setting Loose Plates:

1. Clean concrete and masonry bearing surfaces of any bond-reducing materials, and roughen

to improve bond to surfaces. Clean bottom surface of bearing plates.

2. Set loose leveling and bearing plates on wedges, or other adjustable devices. After the

bearing members have been positioned and plumbed, tighten the anchor bolts. Do not

remove wedges or shims, but if protruding, cut off flush with the edge of the bearing platebefore packing with grout.

3. Pack grout solidly between bearing surfaces and plates to ensure that no voids remain.


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A A CA O S S C O 0 0 00 14

L. Installation of Wheel Guards: Anchor wheel guards to concrete or masonry construction to

comply with manufacturer's instructions. Fill cores solidly with air-entrained concrete having a

28 day minimum compressive strength at 20,670 kPa.

M.

Installation of Bollards: Anchor bollards in concrete by means of pipe sleeves preset andanchored into concrete. After bollards have been inserted into sleeves, fill annular space

between bollard and sleeve solid with non-shrink, nonmetallic grout, mixed and placed to

comply with grout manufacturer's directions.

N. Butt welds or splice butt joints in track. Splices in axial loaded studs shall not be permitted.

Welds shall be fillet, plug, butt, or seam.

1. Secure floor and ceiling runners to structure with power driven anchors spaced not

over 400 mm on center and 150 mm maximum from ends. Closer spacing at discretion

of stud manufacturer based on design loads.

a. Coordinate location and length of anchors with post-tension tendons. Limitpower shot anchors to 13 mm maximum penetration into concrete to avoid

hitting tendons.

b. Provide elastomeric sealant or sill sealer material between concrete structure

and ceiling and floor runner channels at exterior.

O. Slide Clip Detail: Provide flexible connection between studs and building structure to

accommodate slab edge deflection and long term building creep without transferring axial load

to studs.

P. Tolerance: Wall construction to a maximum variation from plumb, level, or true-to-line of 3

mm in 3 m.

END OF SECTION 05 50 00