HomeMy WebLinkAbout05 50 00 Metal FabricationsTHE KENT
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SECTION 05 50 00 - METAL FABRICATIONS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Steel framing and supports for applications where framing and supports are not specified
in other Sections.
2. Elevator machine beams, hoist beams, and divider beams.
3. Steel shapes for supporting elevator door sills.
4. Shelf angles.
5. Metal ladders.
6. Metal floor plate.
7. Elevator pit sump covers.
8. Miscellaneous steel trim.
9. Metal bollards.
10. Pipe and downspout guards.
11. Abrasive metal nosings.
12. Loose bearing and leveling plates for applications where they are not specified in other
Sections.
B. Products furnished, but not installed, under this Section include the following:
1. Loose steel lintels.
2. Anchor bolts, steel pipe sleeves, slotted-channel inserts, and wedge-type inserts
indicated to be cast into concrete or built into unit masonry.
3. Steel weld plates and angles for casting into concrete for applications where they are not
specified in other Sections.
C. Related Requirements:
1. Section 03 30 00 "Cast-in-Place Concrete" for installing anchor bolts, steel pipe sleeves,
slotted-channel inserts, wedge-type inserts, and other items cast into concrete.
2. Section 04 20 00 "Unit Masonry" for installing loose lintels, anchor bolts, and other items
built into unit masonry.
3. Section 05 12 00 "Structural Steel Framing."
4. Section 32 93 00 "Plants" for tree grates.
1.3 COORDINATION
A. Coordinate selection of shop primers with topcoats to be applied over them. Comply with paint
and coating manufacturers' written recommendations to ensure that shop primers and topcoats
are compatible with one another.
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B. Coordinate installation of metal fabrications that are anchored to or that receive other work.
Furnish setting drawings, templates, and directions for installing anchorages, including sleeves,
concrete inserts, anchor bolts, and items with integral anchors, that are to be embedded in
concrete or masonry. Deliver such items to Project site in time for installation.
1.4 ACTION SUBMITTALS
A. Product Data: For the following:
1. Paint products.
2. Grout.
3. Metal nosings.
B. Shop Drawings: Show fabrication and installation details. Include plans, elevations, sections,
and details of metal fabrications and their connections. Show anchorage and accessory items.
Provide Shop Drawings for the following:
1. Steel framing and supports for overhead doors and grilles.
2. Steel framing and supports for applications where framing and supports are not specified
in other Sections.
3. Elevator machine beams, hoist beams, and divider beams.
4. Steel shapes for supporting elevator door sills.
5. Shelf angles.
6. Metal ladders.
7. Metal floor plate and supports.
8. Elevator pit sump covers.
9. Miscellaneous steel trim.
10. Metal bollards.
11. Pipe and downspout guards.
12. Abrasive metal nosings.
13. Loose steel lintels.
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: For professional engineer.
B. Welding certificates.
C. Paint Compatibility Certificates: From manufacturers of topcoats applied over shop primers,
certifying that shop primers are compatible with topcoats.
D. Research/Evaluation Reports: For post-installed anchors, from ICC-ES.
1.6 QUALITY ASSURANCE
A. Welding Qualifications: Qualify procedures and personnel according to AWS D1.1, "Structural
Welding Code - Steel."
B. Welding Qualifications: Qualify procedures and personnel according to the following:
1. AWS D1.1, "Structural Welding Code - Steel."
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1.7 FIELD CONDITIONS
A. Field Measurements: Verify actual locations of walls and other construction contiguous with
metal fabrications by field measurements before fabrication.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Thermal Movements: Allow for thermal movements from ambient and surface temperature
changes acting on exterior metal fabrications by preventing buckling, opening of joints,
overstressing of components, failure of connections, and other detrimental effects.
1. Temperature Change: 120 deg F, ambient; 180 deg F, material surfaces.
2.2 METALS
A. Metal Surfaces, General: Provide materials with smooth, flat surfaces unless otherwise
indicated. For metal fabrications exposed to view in the completed Work, provide materials
without seam marks, roller marks, rolled trade names, or blemishes.
B. Recycled Content of Steel Products: Post-consumer recycled content plus one-half of pre-
consumer recycled content not less than 25 percent.
C. Steel Plates, Shapes, and Bars: ASTM A 36.
D. Rolled-Steel Floor Plate: ASTM A 786, rolled from plate complying with ASTM A 36 or
ASTM A 283, Grade C or D.
E. Steel Tubing: ASTM A 500, cold-formed steel tubing.
F. Steel Pipe: ASTM A 53, Standard Weight (Schedule 40) unless otherwise indicated.
G. Slotted Channel Framing: Cold-formed metal box channels (struts) complying with MFMA-4.
1. Size of Channels: 1-5/8 by 1-5/8 inches.
2. Material: Galvanized steel, ASTM A 653, commercial steel, Type B, with G90 coating;
0.108-inch nominal thickness.
H. Aluminum Castings: ASTM B 26, Alloy 443.0-F.
2.3 FASTENERS
A. General: Unless otherwise indicated, provide Type 304 stainless-steel fasteners for exterior use
and zinc-plated fasteners with coating complying with ASTM B 633 or ASTM F 1941,
Class Fe/Zn 5, at exterior walls. Select fasteners for type, grade, and class required.
1. Provide stainless-steel fasteners for fastening aluminum.
B. Steel Bolts and Nuts: Regular hexagon-head bolts, ASTM A 325, Type 3; with hex nuts,
ASTM A 563, Grade C3; and, where indicated, flat washers.
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C. Anchor Bolts: ASTM F 1554, Grade 36, of dimensions indicated; with nuts, ASTM A 563; and,
where indicated, flat washers.
1. Hot-dip galvanize or provide mechanically deposited, zinc coating where item being
fastened is indicated to be galvanized.
D. Anchors, General: Anchors capable of sustaining, without failure, a load equal to six times the
load imposed when installed in unit masonry and four times the load imposed when installed in
concrete, as determined by testing according to ASTM E 488, conducted by a qualified
independent testing agency.
E. Cast-in-Place Anchors in Concrete: Either threaded type or wedge type unless otherwise
indicated; galvanized ferrous castings, either ASTM A 47 malleable iron or ASTM A 27 cast
steel. Provide bolts, washers, and shims as needed, all hot-dip galvanized per ASTM F 2329.
F. Post-Installed Anchors: Torque-controlled expansion anchors or chemical anchors.
1. Material for Interior Locations: Carbon-steel components zinc plated to comply with
ASTM B 633 or ASTM F 194, Class Fe/Zn 5, unless otherwise indicated.
2. Material for Exterior Locations and Where Stainless Steel Is Indicated: Alloy Group 1
stainless-steel bolts, ASTM F 593, and nuts, ASTM F 594.
G. Slotted-Channel Inserts: Cold-formed, hot-dip galvanized-steel box channels (struts) complying
with MFMA-4, 1-5/8 by 7/8 inches by length indicated with anchor straps or studs not less than
3 inches long at not more than 8 inches o.c. Provide with temporary filler and tee-head bolts,
complete with washers and nuts, all zinc-plated to comply with ASTM B 633, Class Fe/Zn 5, as
needed for fastening to inserts.
2.4 MISCELLANEOUS MATERIALS
A. Shop Primers: Provide primers that comply with Section 09 91 00 "Painting," Section 09 96 00
"High-Performance Coatings" and Section 09 97 01 “High Performance Coatings-Aliphatic
Polyurethane.”
B. Galvanizing Repair Paint: High-zinc-dust-content paint complying with SSPC-Paint 20 and
compatible with paints specified to be used over it.
C. Bituminous Paint: Cold-applied asphalt emulsion complying with ASTM D 1187.
D. Non-shrink, Non-metallic Grout: Factory-packaged, non-staining, non-corrosive, non-gaseous
grout complying with ASTM C 1107. Provide grout specifically recommended by manufacturer
for interior and exterior applications.
E. Concrete: Comply with requirements in Section 03 30 00 "Cast-in-Place Concrete" for normal-
weight, air-entrained, concrete with a minimum 28-day compressive strength of 3000 psi.
2.5 FABRICATION, GENERAL
A. Shop Assembly: Pre-assemble items in the shop to greatest extent possible. Dis-assemble units
only as necessary for shipping and handling limitations. Use connections that maintain
structural value of joined pieces. Clearly mark units for reassembly and coordinated installation.
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B. Cut, drill, and punch metals cleanly and accurately. Remove burrs and ease edges to a radius
of approximately 1/32 inch unless otherwise indicated. Remove sharp or rough areas on
exposed surfaces.
C. Form bent-metal corners to smallest radius possible without causing grain separation or
otherwise impairing work.
D. Form exposed work with accurate angles and surfaces and straight edges.
E. Weld corners and seams continuously to comply with the following:
1. Use materials and methods that minimize distortion and develop strength and corrosion
resistance of base metals.
2. Obtain fusion without undercut or overlap.
3. Remove welding flux immediately.
4. At exposed connections, finish exposed welds and surfaces smooth and blended so no
roughness shows after finishing and contour of welded surface matches that of adjacent
surface.
F. Form exposed connections with hairline joints, flush and smooth, using concealed fasteners or
welds where possible. Where exposed fasteners are required, use Phillips flat-head
(countersunk) fasteners unless otherwise indicated. Locate joints where least conspicuous.
G. Fabricate seams and other connections that are exposed to weather in a manner to exclude
water. Provide weep holes where water may accumulate.
H. Cut, reinforce, drill, and tap metal fabrications as indicated to receive finish hardware, screws,
and similar items.
I. Provide for anchorage of type indicated; coordinate with supporting structure. Space anchoring
devices to secure metal fabrications rigidly in place and to support indicated loads.
J. Where units are indicated to be cast into concrete or built into masonry, equip with integrally
welded steel strap anchors, 1/8 by 1-1/2 inches, with a minimum 6-inch embedment and 2-inch
hook, not less than 8 inches from ends and corners of units and 24 inches o.c., unless
otherwise indicated.
2.6 MISCELLANEOUS FRAMING AND SUPPORTS
A. General: Provide steel framing and supports not specified in other Sections as needed to
complete the Work.
B. Fabricate units from steel shapes, plates, and bars of welded construction unless otherwise
indicated. Fabricate to sizes, shapes, and profiles indicated and as necessary to receive
adjacent construction.
1. Fabricate units from slotted channel framing where indicated.
2. Furnish inserts for units installed after concrete is placed.
C. Galvanize miscellaneous framing and supports where indicated.
D. Prime miscellaneous framing and supports with primer specified in Section 09 96 00 "High-
Performance Coatings" where indicated.
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2.7 SHELF ANGLES
A. Fabricate shelf angles from steel angles of sizes indicated and for attachment to concrete
framing. Provide horizontally slotted holes to receive 3/4-inch bolts, spaced not more than 6
inches from ends and 24 inches o.c., unless otherwise indicated.
1. Provide mitered and welded units at corners.
2. Provide open joints in shelf angles at expansion and control joints. Make open joint
approximately 2 inches larger than expansion or control joint.
B. For cavity walls, provide vertical channel brackets to support angles from backup masonry and
concrete.
C. Galvanize and prime shelf angles located in exterior walls.
D. Furnish wedge-type concrete inserts, complete with fasteners, to attach shelf angles to cast-in-
place concrete.
2.8 METAL LADDERS
A. General:
1. Comply with ANSI A14.3, except for elevator pit ladders.
2. For elevator pit ladders, comply with ASME A17.1/CSA B44.
B. Steel Ladders:
1. Space side rails 16 inches apart unless otherwise indicated.
2. Side rails: Continuous, 3/8-by-2-1/2-inch steel flat bars, with eased edges.
3. Rungs: 3/4-inch- diameter steel bars.
4. Fit rungs in centerline of side rails; plug-weld and grind smooth on outer rail faces.
5. Provide nonslip surfaces on top of each rung, either by coating rung with aluminum-oxide
granules set in epoxy-resin adhesive or by using a type of manufactured rung filled with
aluminum-oxide grout.
6. Provide platforms as indicated fabricated from welded or pressure-locked steel bar
grating, supported by steel angles. Limit openings in gratings to no more than 3/4 inch in
least dimension.
7. Support each ladder at top and bottom and not more than 60 inches o.c. with welded or
bolted steel brackets.
8. Galvanize and prime ladders, including brackets.
2.9 METAL FLOOR PLATE
A. Fabricate from rolled-steel floor plate of thickness indicated below:
1. Thickness: As indicated.
B. Provide grating sections where indicated fabricated from welded or pressure-locked steel bar
grating. Limit openings in gratings to no more than 1/2 inch in least dimension.
C. Provide steel angle supports as indicated.
D. Include steel angle stiffeners, and fixed and removable sections as indicated.
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E. Provide flush steel bar drop handles for lifting removable sections, one at each end of each
section.
2.10 ELEVATOR PIT SUMP COVERS
A. Fabricate from 1/8-inch rolled-steel floor plate with four 1-inch- diameter holes for water
drainage and for lifting.
B. Provide steel angle supports as indicated.
2.11 MISCELLANEOUS STEEL TRIM
A. Unless otherwise indicated, fabricate units from steel shapes, plates, and bars of profiles shown
with continuously welded joints and smooth exposed edges. Miter corners and use concealed
field splices where possible.
B. Provide cutouts, fittings, and anchorages as needed to coordinate assembly and installation
with other work.
1. Provide with integrally welded steel strap anchors for embedding in concrete or masonry
construction.
C. Galvanize and prime exterior miscellaneous steel trim.
2.12 METAL BOLLARDS
A. Fabricate metal bollards from Schedule 40 steel pipe.
1. Cap bollards with 1/4-inch- thick steel plate.
2. Where bollards are indicated to receive controls for door operators, provide cutouts for
controls and holes for wire.
3. Where bollards are indicated to receive light fixtures, provide cutouts for fixtures and
holes for wire.
B. Fabricate sleeves for bollard anchorage from steel pipe or tubing with 1/4-inch- thick steel plate
welded to bottom of sleeve. Make sleeves not less than 8 inches deep and 3/4 inch larger than
OD of bollard.
C. Fabricate internal sleeves for removable bollards from Schedule 40 steel pipe or 1/4-inch wall-
thickness steel tubing with an OD approximately 1/16 inch less than ID of bollards. Match drill
sleeve and bollard for 3/4-inch steel machine bolt.
2.13 PIPE AND DOWNSPOUT GUARDS
A. Fabricate pipe and downspout guards from 3/8-inch- thick by 12-inch- wide steel plate, bent to
fit flat against the wall or column at both ends and to fit around pipe with 2-inch clearance
between pipe and pipe guard. Drill each end for two 3/4-inch anchor bolts.
B. Galvanize and prime pipe and downspout guards.
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2.14 ABRASIVE METAL NOSINGS
A. Cast-Metal Units: Cast iron, with an integral-abrasive, as-cast finish consisting of aluminum
oxide, silicon carbide, or a combination of both. Fabricate units in lengths necessary to
accurately fit openings or conditions.
1. Manufacturers: Subject to compliance with requirements, available manufacturers
offering products that may be incorporated into the Work include, but are not limited to,
the following:
a. American Safety Tread Co., Inc.
b. Balco, Inc.
c. Barry Pattern & Foundry Co., Inc.
d. Granite State Casting Co.
e. Safe-T-Metal Company, Inc.
f. Wooster Products Inc.
2. Nosings: Cross-hatched units, 1-1/2 by 1-1/2 inches, for casting into concrete.
2.15 LOOSE BEARING AND LEVELING PLATES
A. Provide loose bearing and leveling plates for steel items bearing on masonry or concrete
construction. Drill plates to receive anchor bolts and for grouting.
B. Galvanize plates.
2.16 LOOSE STEEL LINTELS
A. Fabricate loose steel lintels from steel angles and shapes of size indicated for openings and
recesses in masonry walls and partitions at locations indicated. Fabricate in single lengths for
each opening unless otherwise indicated. Weld adjoining members together to form a single
unit where indicated.
B. Size loose lintels to provide bearing length at each side of openings equal to 1/12 of clear span,
but not less than 8 inches unless otherwise indicated.
C. Galvanize and prime loose steel lintels located in exterior walls.
2.17 STEEL WELD PLATES AND ANGLES
A. Provide steel weld plates and angles not specified in other Sections, for items supported from
concrete construction as needed to complete the Work. Provide each unit with no fewer than
two integrally welded steel strap anchors for embedding in concrete.
2.18 FINISHES, GENERAL
A. Finish metal fabrications after assembly.
B. Finish exposed surfaces to remove tool and die marks and stretch lines, and to blend into
surrounding surface.
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2.19 STEEL AND IRON FINISHES
A. Galvanizing: Hot-dip galvanize items as indicated to comply with ASTM A 153 for steel and iron
hardware and with ASTM A 123 for other steel and iron products.
1. Do not quench or apply post galvanizing treatments that might interfere with paint
adhesion.
B. Preparation for Shop Priming Galvanized Items: After galvanizing, thoroughly clean railings of
grease, dirt, oil, flux, and other foreign matter, and treat with metallic phosphate process.
C. Shop prime iron and steel items not indicated to be galvanized unless they are to be embedded
in concrete, sprayed-on fireproofing, or masonry, or unless otherwise indicated.
1. Shop prime with primers specified in Section 09 91 00 "Painting" unless primers specified
in Section 09 96 00 "High-Performance Coatings" or 09 97 01 “High Performance
Coatings – Aliphatic Polyurethane” are indicated.
D. Preparation for Shop Priming: Prepare surfaces to comply with requirements indicated below:
1. Exterior Items: SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
2. Items Indicated to Receive Zinc-Rich Primer: SSPC-SP 6/NACE No. 3, "Commercial
Blast Cleaning."
3. Items Indicated to Receive Primers Specified in Section 099600 "High-Performance
Coatings": SSPC-SP 6/NACE No. 3, "Commercial Blast Cleaning."
4. Other Items: SSPC-SP 3, "Power Tool Cleaning."
2.20 ALUMINUM FINISHES
A. As-Fabricated Finish: AA-M12.
B. Clear Anodic Finish: AAMA 611, Class I, AA-M12C22A41.
PART 3 - EXECUTION
3.1 INSTALLATION, GENERAL
A. Cutting, Fitting, and Placement: Perform cutting, drilling, and fitting required for installing metal
fabrications. Set metal fabrications accurately in location, alignment, and elevation; with edges
and surfaces level, plumb, true, and free of rack; and measured from established lines and
levels.
B. Fit exposed connections accurately together to form hairline joints. Weld connections that are
not to be left as exposed joints but cannot be shop welded because of shipping size limitations.
Do not weld, cut, or abrade surfaces of exterior units that have been hot-dip galvanized after
fabrication and are for bolted or screwed field connections.
C. Field Welding: Comply with the following requirements:
1. Use materials and methods that minimize distortion and develop strength and corrosion
resistance of base metals.
2. Obtain fusion without undercut or overlap.
3. Remove welding flux immediately.
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4. At exposed connections, finish exposed welds and surfaces smooth and blended so no
roughness shows after finishing and contour of welded surface matches that of adjacent
surface.
D. Fastening to In-Place Construction: Provide anchorage devices and fasteners where metal
fabrications are required to be fastened to in-place construction. Provide threaded fasteners for
use with concrete and masonry inserts, toggle bolts, through bolts, lag screws, wood screws,
and other connectors.
E. Provide temporary bracing or anchors in formwork for items that are to be built into concrete,
masonry, or similar construction.
F. Corrosion Protection: Coat concealed surfaces of aluminum that come into contact with grout,
concrete, masonry, wood, or dissimilar metals with the following:
1. Cast Aluminum: Heavy coat of bituminous paint.
2. Extruded Aluminum: Two coats of clear lacquer.
3.2 INSTALLING MISCELLANEOUS FRAMING AND SUPPORTS
A. General: Install framing and supports to comply with requirements of items being supported,
including manufacturers' written instructions and requirements indicated on Shop Drawings.
3.3 INSTALLING METAL BOLLARDS
A. Fill metal-capped bollards solidly with concrete and allow concrete to cure seven days before
installing.
1. Do not fill removable bollards with concrete.
B. Anchor bollards to existing construction with expansion anchors. Provide four 3/4-inch bolts at
each bollard unless otherwise indicated.
1. Embed anchor bolts at least 4 inches in concrete.
C. Anchor bollards in place with concrete footings. Center and align bollards in holes 3 inches
above bottom of excavation. Place concrete and vibrate or tamp for consolidation. Support and
brace bollards in position until concrete has cured.
D. Anchor internal sleeves for removable bollards in concrete by inserting in pipe sleeves preset
into concrete. Fill annular space around internal sleeves solidly with non-shrink grout; mixed
and placed to comply with grout manufacturer's written instructions. Slope grout up
approximately 1/8 inch toward internal sleeve.
E. Place removable bollards over internal sleeves and secure with 3/4-inch machine bolts and
nuts. After tightening nuts, drill holes in bolts for inserting padlocks. Owner furnishes padlocks.
F. Fill bollards solidly with concrete, mounding top surface to shed water.
1. Do not fill removable bollards with concrete.
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3.4 INSTALLING PIPE GUARDS
A. Provide pipe guards at exposed vertical pipes in parking garage where not protected by curbs
or other barriers. Install by bolting to wall or column with expansion anchors. Provide four 3/4-
inch bolts at each pipe guard. Mount pipe guards with top edge 26 inches above driving surface.
3.5 INSTALLING NOSINGS
A. Center nosings on tread widths unless otherwise indicated.
B. For nosings embedded in concrete steps or curbs, align nosings flush with riser faces and level
with tread surfaces.
3.6 INSTALLING BEARING AND LEVELING PLATES
A. Clean concrete and masonry bearing surfaces of bond-reducing materials and roughen to
improve bond to surfaces. Clean bottom surface of plates.
B. Set bearing and leveling plates on wedges, shims, or leveling nuts. After bearing members have
been positioned and plumbed, tighten anchor bolts. Do not remove wedges or shims but, if
protruding, cut off flush with edge of bearing plate before packing with non-shrink grout. Pack
grout solidly between bearing surfaces and plates to ensure that no voids remain.
3.7 ADJUSTING AND CLEANING
A. Touchup Painting: Cleaning and touchup painting of field welds, bolted connections, and
abraded areas of shop paint are specified in Section 09 91 00 "Painting."
B. Galvanized Surfaces: Clean field welds, bolted connections, and abraded areas and repair
galvanizing to comply with ASTM A 780.
END OF SECTION 05 50 00