SECTION 05120
STRUCTURAL STEEL
PART 1
GENERAL
1.01 SUMMARY
A.
Section Includes
1.
All plant, labor, and material required to furnish and install all structural steel, as
set forth on the Drawings and in accordance with this section of the
Specifications.
2.
Furnish all fabricated structural steel, including erection, supporting steel
assemblies, and continuous angles and outriggers also, provide all connections
directly or indirectly required to complete the steel construction, as shown on
the Drawings or defined in Section 2 of the AISC Code of Standard Practice,
latest edition.
3.
Provide holes through structural members for fastenings or for passage of work
by others as indicated on Drawings, or called for on shop drawings.
B.
Related Sections:
1.
Section 05510 - Metal Stairs
2.
Section 09900 - Painting
1.02 REFERENCES
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A.
ASTM A36 - Structural Steel.
B.
ASTM A53 - Hot-Dipped, Zinc-coated Welded and Seamless Steel Pipe.
C.
ASTM A108 - Steel Bars, Carbon, Cold-Finished, Standard Quality.
D.
ASTM A123 - Zinc (Hot Dipped Galvanized) Coatings on Iron and Steel Products.
E.
ASTM A153 - Zinc Coating (Hot Dip) on Iron and Steel Hardware.
F.
ASTM A307 - Carbon Steel Externally Threaded Standard Fasteners.
G.
ASTM A325 - High Strength Bolts for Structural Steel Joints.
H.
ASTM A490 - Quenched and Tempered Alloy Steel Bolts for Structural Steel Joints.
I.
ASTM A500 - Cold-Formed Welded and Seamless Carbon Steel Structural Tubing in
Round and Shapes.
J.
ASTM A501 - Hot-Formed Welded and Seamless Carbon Steel Structural Tubing.
K.
AWS A2.0 - Standard Welding Symbols.
L.
AWS D1.1 - Structural Welding Code.
M.
AISC - Specification for the Design, Fabrication and Erection of Structural Steel for
Buildings.
N.
AISC - Specification for Architectural Exposed Structural Steel.
O.
SSPC - Steel Structures Painting Council.
05120-1
SECTION 05120
1.03 SUBMITTALS
A.
Submit under provisions of Section 01300.
B.
Shop Drawings: The structural steel fabricator shall prepare and furnish complete
sets of shop drawings, including:
1.
Anchor bolt layout, erection diagram, and details.
2.
Indicate welded connections with AWS 2.0 welding symbols. Indicate net weld
lengths.
3.
Clearly distinguish between bolted and welded connections.
4.
All work in conformity with best modern practice, with due regard to speed and
economy in fabrication and erection.
5.
No fabrication shall be started until shop drawings are approved without
qualification by the ENGINEER.
6.
Shop Drawings shall be sealed by a Professional Engineer licensed in the State
of Pennsylvania.
C.
Coordination: The CONTRACTOR shall coordinate the structural steel shop drawings
and work, including:
1.
Cuts and Alterations: Whenever the work of other trades requires the structural
steel to be cut, drilled or otherwise altered, the CONTRACTOR shall see that
the fabricator receives the complete information as to size, location and number
of alterations prior to the preparation of shop detail drawings.
2.
Check thoroughly all shop drawings submitted by the fabricator for errors,
before forwarding same to the ENGINEER.
3.
Be responsible for the accurate location and correct elevations for the erection
of all anchor bolts for column bases.
D.
Welders' Certificate: Submit under provisions of Section 01400 Manufacturer's
Certificates, certifying welders employed on the work, verifying AWS qualifications
within the previous 12 months.
E.
Mill Test Reports: Submit under provisions of Section 01400 Manufacturer's
Certificates, indicating structural strength, destructive and non-destructive test
analysis.
1.04 QUALITY ASSURANCE
A.
Fabricate structural steel members in accordance with AISC - Specification for the
Design, Fabrication and Erection of Structural Steel for Buildings.
1.05 PROJECT/SITE CONDITIONS
A.
PART 2
Verify that field measurements are as shown on shop drawings.
PRODUCTS
2.01 MATERIALS
1364002201
A.
Structural Steel: Use new, standard sections of minimum weights shown, conforming
ASTM A36.
B.
High Strength Bolts: Use sizes shown, complying with 1962 Research Council
Specifications and ASTM A325 or ASTM A490.
C.
Bolts and Nuts: Marked for quick identification, shall comply with ASTM A307
requirements for Grade "A" semi-finished bolts. Nuts shall comply with Grade "B" ASA
B18.2.1 requirements for heavy hexagon semifinished nuts.
05120-2
SECTION 05120
D.
Washers: Used with high strength bolts, shall be heavy, plain, smooth, flat
carburized, quenched and tempered washers, complying with ASA B27.2. Exception,
where bearing surfaces are sloped 1:20 or more, in relation to a plane normal to the
bolt axis, then the beveled washers shall be used which permit the nut to be tightened
against a nonsloping surface.
E.
Other Required Metals: Including alloy steels, cast iron, etc., shall conform to
applicable specifications of the ASTM as amended to date.
2.02 SHOP PAINTING
A.
PART 3
All shop painting shall comply with the requirements of PAINTING; Section 09900.
EXECUTION
3.01 DESIGN
A.
Intent: Except for those items peculiar to this installation, or as otherwise shown or
noted, furnish all fabricated structural steel, including supporting steel assemblies, and
continuous angles and outriggers; also, all connections directly or indirectly required
to complete the steel construction, as shown on the structural drawings. Steel shall
be designed, fabricated and erected in accordance with the "Specifications for the
Design, Fabrication and Erection of Structural Steel for Buildings," "Code of Standard
Practice for Steel Buildings and Bridges," latest editions, as adopted by the American
Institute of Steel Construction and applicable local building codes.
B.
Field Connections: All field connections shall be made with high strength bolts with
washers. Where feasible, connections to members framing to column webs shall be
made with seated connections, or welded to columns and field-bolted to beams. Top
angles or side clips shall be bolted to both beams and columns. Thickness of seat
angles shall be not less than ½". Eccentricity of connections shall be kept to a
minimum.
C.
Care shall be exercised to add additional reinforcing as required where members are
cut or coped to meet framing conditions.
3.02 WELDED CONSTRUCTION
A.
Standards: All welding shall be done by shielded electric metal- arc, in accordance
with the American Welding Society, and AISC Specifications referenced herein.
B.
Operators: Welds shall be made only by welders, tackers and welding operators who
have been previously qualified by tests, as prescribed in the "Standard Qualification
Procedure" of the above American Welding Society Code to perform the type of work
required, except that this provision need not apply to tack welds not later incorporated
into finished welds carrying calculated stress.
3.03 BOLTS
1364002201
A.
General: High strength bolts shall be provided for connections noted on structural
drawings or specified, installed by means of "Turn-of-Nut" method. These bolts may
be used in shop work where it is impracticable to drive satisfactory rivets. Work shall
conform to the latest edition of the ASCE Research Council's "Specifications for
Structural Joints Using ASTM A325 Bolts."
B.
Wrench Sockets: Impact wrench sockets shall be of the bolt clearance type with
internal broached surfaces in good condition. Visible marks, 90° apart and
05120-3
SECTION 05120
differentiated either by color or by number of marks, shall be placed on the outside
walls of the socket. These marks will aid greatly in observing the amount of rotation.
C.
Tightening Instructions: The procedure to be followed, methods of installation and
tension control, type of wrenches to be used, and inspection methods shall conform to
specifications for "Structural Joints Using ASTM A325 Bolts," as approved by the
Research Council on Riveted and Bolted Structural Joints of the Engineering
Foundation.
1.
The high strength bolts used shall have a suitable identifying mark placed on
top of the head before leaving the factory.
2.
Tightening of nuts shall be done with properly calibrated wrenches. The
minimum bolt tension for the size of bolt used shall be in accordance with
tables listed in the above referenced standards.
3.
When calibrated wrenches are used, each wrench shall be checked for
accuracy at least once daily for actual conditions of application.
4.
Bolting crews shall be sure to mark completed work with the identifying symbols
assigned to them.
D.
Length of Bolts: The shank of bolts shall be long enough to provide full bearing;
washers must be used under all nuts to provide a full grip when nuts are turned tight.
Nuts shall be self-locking or bolt threads shall be upset to prevent backing off of nuts.
E.
Semi-Finished Bolts: Use for the erection of structural sections at locations where
oversized holes or slots are provided for movement. The shank shall be long enough
to provide full bearing; washers must be used under the nuts to provide a full grip
when nuts are turned tight. Nuts shall be self-locking or bolt threads shall be upset to
prevent backing off of nuts.
3.04 FABRICATION
1364002201
A.
Workmanship: All material shall be clean and straight, fabricated in accordance with
the best practices of modern shops. If straightening or flattening is necessary, it shall
be done by a process and in a manner that will not injure the material. Sharp kinks or
bends shall be cause for rejection.
B.
Bolt Holes: Drifting to enlarge unfair holes shall not be permitted. Poor matching of
holes shall be sufficient cause for rejection.
1.
Holes for high strength bolts shall be punched or drilled truly cylindrical and not
1
more than ⁄ 16 " larger than the external diameter of the bolts.
2.
Surfaces of parts adjacent to bolt head and nut shall be parallel, fit solidly when
assembled without gaskets or fillers of flexible material.
3.
When assembled, all joint surfaces, including those adjacent to the bolt heads,
nuts, or washers, shall be free of scale, burrs, dirt, and other foreign material
that would prevent solid seating of the parts.
C.
Welding: Surfaces to be welded shall be free from loose scale, slag, rust, grease,
paint, and any other foreign material. A light film of linseed oil may be disregarded.
Joint surfaces shall be free from fins and tears. Preparation of edges by gas cutting
shall, wherever practicable, be done with a mechanically guided torch. Work shall be
positioned for flat welding whenever practicable.
D.
Fillet Welds: Parts to be fillet-welded shall be brought in as close contact as
practicable and shall conform to Paragraphs 1.17.5 - 1.17.11 of AISC Specifications.
E.
Butt Welds: Butt welds shall not be permitted except where specifically indicated on
the Drawings.
F.
Temperatures: No welding shall be done when the temperature of the base metal is
lower than 0° F. At temperatures between 32° F and 0° F., the surface of all areas
05120-4
SECTION 05120
within 3" of the point where a weld is to be started shall be heated to a temperature at
least warm to the hand before welding is started.
3.05 ERECTION
A.
General: The structural steel erector shall furnish all equipment and bracing required
for the erection of structural steel and provide for its operation. He shall assume all
risks from storms or accidents and all damage to persons and property resulting from
his work until his work is completed. Any reaming shall be shop- performed in
accordance with the requirements of Section 1.23.4 of the AISC Specifications.
B.
Bracing: Framing shall be carried up uniformly throughout the building level and
plumb, with temporary bracing introduced where-ever necessary to take care of all
loads to which the structure may be subjected, including wind loading, piles of
materials, or equipment and the operation of same. Such bracing shall be left in place
as long as may be required for safety.
C.
Tolerances: Structural steel shall be considered plumb, level and aligned if the error
does not exceed 1 to 500, except that in the case at elevator shaft and at window
walls, the structural steel columns shall be considered plumb and aligned if the error
does not exceed 1 to 1000.
D.
Bolting: As erection progresses, the work shall be securely bolted up to take care of
dead load, wind and erection stresses. No bolting shall be done until as much of the
structure as will be stiffened by the bolting has been aligned properly.
E.
Correction of Errors: Corrections of minor misfits by the use of drift pins and a
moderate amount of reaming, chipping, or cutting shall be considered a part of
erection. However, all errors which prevent the proper assembly of parts shall be
promptly reported to the ENGINEER, who shall determine the responsibility and
method of correction.
END OF SECTION
1364002201
05120-5
SECTION 05140
STRUCTURAL ALUMINUM
PART 1
GENERAL
1.01 SUMMARY
A.
Section Includes
1.
All plant, labor, and material required to furnish and install all structural
aluminum, as set forth on the Drawings and in accordance with this section of
the Specifications.
2.
Furnish all fabricated structural aluminum, including erection and supporting
assemblies; provide all connections directly or indirectly required to complete
the aluminum construction as shown on the Drawings.
3.
Provide holes through structural members for fastening or for passage of work
by others as indicated on Drawings, or called for on shop drawings.
B.
Related Sections
1.
Section 05510 - Metal Stairs
2.
Section 05520 - Handrails and Railings
3.
Section 05531 - Aluminum Gratings
4.
Section 06615 - FRP Gratings
5.
Section 09900 - Painting: Field paint finish
1.02 REFERENCES
A.
AWS A2.0 - Standard Welding Symbols.
B.
AWS D1.1 - Structural Welding Code.
C.
ASTM B211 - Aluminum-Alloy Bars, Rods, and Wire.
D.
ASTM B221 - Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes.
1.03 SUBMITTALS
1364002201
A.
Submit under provisions of Section 01300.
B.
Shop Drawings: structural aluminum fabricator to prepare and furnish complete sets
of shop drawings sealed by a professional engineer, and includes:
1.
Anchor bolt layout, erection diagram, and details.
2.
Indicate welded connections with AWS 2.0 welding symbols. Indicate net weld
lengths.
3.
Clearly distinguish between bolted and welded connections.
4.
All work in conformity with best modern practice, with due regard to speed and
economy in fabrication and erection.
C.
Coordinate the structural aluminum shop drawings and work, including:
1.
Cuts and alterations: Whenever the work of other trades requires the structural
aluminum to be cut, drilled or otherwise altered, send the fabricator complete
information as to size, location and number of alterations prior to the
preparation of shop detail drawings.
2.
Check thoroughly all shop drawings submitted by the fabricator for errors,
before forwarding same to the ENGINEER.
3.
Be responsible for the accurate location and correct elevations for the erection
of all anchor bolts for column bases.
05140-1
SECTION 05140
D.
Mill Test Reports: Submit under provisions of Section 01400 Manufacturer's
Certificates, indicating structural strength, destructive and non-destructive test
analysis.
1.04 QUALITY CONTROL
A.
PART 2
Qualifications
1.
Fabricator: Company specializing in performing the work of this section with
minimum three years documented experience.
2.
Connections not detailed on the Drawings shall be designed by a Professional
Engineer experienced in the design of this work and licensed in the State of
Pennsylvania.
PRODUCTS
2.01 MATERIALS
A.
Structural Aluminum: Use new, standard sections of minimum weights shown,
conforming to Aluminum Association of America Standards for structural sections,
Alloy Type 6061.
B.
Bolts, Washers, and Nuts: Mark for quick identification, use ASTM Type 304 or 316
stainless steel.
2.02 FINISH
A.
PART 3
After erection or assembly, air blast the entire structure with 100 mesh glass beads to
provide a uniform matte finish and to remove all markings and weld heat marks.
EXECUTION
3.01 DESIGN
A.
Intent: Furnish all fabricated structural aluminum, including supporting assemblies and
all connections directly or indirectly required to complete the aluminum construction,
as shown on the Drawings.
B.
Field Connections: Except at expansion connections, or as noted on the Drawings,
make all field connections with ASTM Type 304 or 316 stainless steel bolts, nuts, and
washers.
Where feasible, make connections to column webs with seated
connections, shop-riveted or welded to columns and field-bolted to beams. Bolt top
angles or side clips to both beams and columns. Make thickness of seat angles at
least 1/2". Keep eccentricity of connections to a minimum. Use appropriate sized
pads of 1/4" thick reinforced neoprene to isolate the aluminum where connections are
to concrete or steel.
C.
Expansion Connections: Expansion connections are shown on the Drawings.
D.
Add additional reinforcing where members are cut or coped to meet framing
conditions.
3.02 WELDED CONSTRUCTION
A.
1364002201
General: These specifications apply to both field and shop welding operations.
Adhere to the general recommendations and regulations shown in the American
Welding Society Specifications D1.1 Structural Welding Code.
05140-2
SECTION 05140
B.
Preparation for Welding: Remove dirt, grease, forming or machining lubricants, or any
organic materials from the areas to be welded by cleaning with a suitable solvent or
by vapor degreasing. Remove the oxide coating just prior to welding. This may be
done by etching or scratch brushing. Use suitable edge preparation to assure 100%
penetration in butt welds. Do not use oxygen cutting. Sawing, chipping, machining,
shearing, or cutting may be used.
C.
Welding Procedure: Use an inert gas shielded arc or resistance welding process.
Use no welding process that requires a welding flux. Provide an aluminum alloy filler
metal that is capable of meeting the qualification test requirements that generates
welds having resistance to corrosion equal to or greater than that of the welded alloy.
Preheating for welding is permissible, provided the temperature does not exceed
400° F for a total time of 30 minutes.
D.
Qualification of Welding Procedure and Welding Operators: ASME Boiler and
Pressure Vessel Code, Section IX, "Welding Qualifications." Use aluminum alloys for
the qualification test plates.
E.
Rewelding Defects: Portions of joints that have been rejected on inspection because
of defects may be repaired only by rewelding. Remove the defective area by chipping
or machining. Do not use flame cutting. Before rewelding, inspect the joint to assure
that all of the defective weld metal has been removed and that the joint is accessible
so that the welder can obtain full penetration through the joint.
3.03 FABRICATION
A.
Workmanship: Clean and straight welds, fabricated in accordance with the best
practices of modern shops. If straightening or flattening is necessary, use a process
that will not injure the material. Sharp kinks or bends will be rejected.
B.
Bolt Holes: Drifting to enlarge unfair holes is not permitted. Poor matching of holes is
sufficient cause for rejection.
1.
Punch or drill truly cylindrical holes for bolts not more than 1/16" larger than the
external diameter of the bolts.
2.
Keep surfaces of parts adjacent to bolt head and nut parallel, fit solidly when
assembled without gaskets or fillers of flexible material.
3.
When assembled, keep all joint surfaces, including those adjacent to the
boltheads, nuts, or washers, free of burrs, dirt, and other foreign material that
would prevent solid seating of the parts.
3.04 ERECTION
1364002201
A.
General: Furnish all equipment and bracing required for the erection of structural
aluminum and provide for its operation. Assume all risks from storms or accidents
and all damage to persons and property resulting from erection work until the work is
completed.
B.
Bracing: Carry framing up uniformly throughout the building, level and plumb, with
temporary bracing introduced where necessary to take care of all loads to which the
structure may be subjected (wind loading, piles of materials, or equipment). Leave
bracing in place as long as may be required for safety.
C.
Tolerances: Structural aluminum shall be considered plumb, level and aligned if the
error does not exceed 1 to 500.
D.
Bolting: As erection progresses, bolt the work securely to take care of dead load,
wind, and erection stresses. Perform no bolting until the structure has been aligned
properly.
05140-3
SECTION 05140
E.
Correction of Errors: Correction of minor misfits by the use of drift pins and a
moderate amount of reaming, chipping, or cutting is acceptable. However, report to
the ENGINEER all errors which prevent the proper assembly of parts. ENGINEER
will determine the responsibility for and method of correction.
END OF SECTION
1364002201
05140-4
SECTION 05400
NON-LOAD-BEARING METAL FRAMING SYSTEM
PART 1
GENERAL
1.01 SUMMARY
A.
Section includes metal stud framing and accessories.
B.
Related Sections:
1. Section 06114 - Wood Blocking and Curbing
2. Section 07260 - Vapor Retarders.
3. Section 07213 - Batt Insulation: Insulation between framing members.
4. Section 09260 - Gypsum Board Systems
1.02 REFERENCES
A.
ASTM A123 - Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products.
B.
ASTM A653/A653M - Steel Sheet, Zinc-Coated (Galvanized) or Zinc-Iron Alloy-Coated
(Galvannealed) by the Hot-Dip Process.
C.
ASTM A591/A591M - Steel Sheet, Electrolytic Zinc-Coated, for Light Coating Mass
Applications.
D.
ASTM C645 - Non-Load Bearing (Axial) Steel Studs, Runners (Track), and Rigid
Furring Channels for Screw Application of Gypsum Board.
E.
ASTM C754 - Installation of Steel Framing Members to Receive Screw-Attached
Gypsum Board.
F.
ASTM C1002 - Steel Drill Screws for the Application of Gypsum Board or Metal
Plaster Bases.
G.
ML/SFA 540 - (Metal Lath/Steel Framing Association, Division of National Association
of Architectural Metal Manufacturers) - Lightweight Steel Framing Manual.
H.
SSPC Paint 20 (Steel Structures Painting Council) - Zinc Rich Primers.
1.03 SYSTEM DESCRIPTION
A.
Interior Walls: Metal stud framing system with batt type insulation and interior gypsum
board.
B.
Maximum Allowable Deflection: L/240.
C.
Wall System: Design to provide for movement of components without damage, failure
of joint seals, undue stress on fasteners, or other detrimental effects when subject to
seasonal or cyclic day/night temperature ranges.
1.04 SUBMITTALS
1364002201
A.
Section 01330 - Submittal Procedures: Submittal procedures.
B.
Shop Drawings:
05400-1
Section 05400
1.
2.
Indicate prefabricated work, component details, stud layout, framed openings,
anchorage to structure, type and location of fasteners, and accessories or items
required of other related work.
Describe method for securing studs to tracks, and for blocking and reinforcement
to framing connections.
C.
Product Data: Submit data describing standard framing member materials and finish,
product criteria, load charts, and limitations.
D.
Manufacturer's Installation Instructions:
conditions requiring special attention.
Submit special procedures, perimeter
1.05 QUALITY CONTROL
A.
Perform Work in accordance with ASTM C754 and ML/SFA 540.
B.
Form, fabricate, install, and connect components in accordance with ML/SFA 540.
1.06 QUALIFICATIONS
A.
Manufacturer: Company specializing in manufacturing products specified in this
section with minimum three years documented experience.
B.
Installer: Company specializing in performing Work of this section with minimum three
years documented experience.
C.
Design structural elements under direct supervision of Professional Engineer licensed
in the State of Pennsylvania.
1.07 COORDINATION
PART 2
A.
Coordinate work under provisions of Section 01039.
B.
Coordinate placement of components within stud framing system.
PRODUCTS
2.01 METAL FRAMING SYSTEM
A.
Manufacturers:
1. Clark Steel Framing Systems.
2. Dietrich Industries, Inc.
3. Harrison Manufacturing Co.
4. Substitutions: Under provisions of Section 01600.
2.02 COMPONENTS
1364002201
A.
Framing System Components: ASTM C645.
B.
Studs: Recommend by manufacturer for corrosive environment, non-load bearing
rolled steel, channel shaped, and punched for utility access.
C.
Tracks and Headers: Same material and thickness as studs, bent leg retainer
notched to receive studs with provision for crimp locking to stud. Ceiling Runners:
With extended leg retainer.
05400-2
Section 05400
D.
Furring and Bracing Members: Of same material as studs; thickness to suit purpose.
E.
Fasteners: ASTM C1002.
F.
Anchorage Devices: Drilled expansion bolts.
G.
Sealant: As specified in Section 07900.
H.
Touch-Up Primer for Galvanized Surfaces: SSPC-Paint 20.
2.03 FABRICATION
A.
Fabricate assemblies of framed sections to sizes and profiles required.
B.
Fit, reinforce, and brace framing members to suit design requirements.
C.
Fit and assemble in largest practical sections for delivery to site, ready for installation.
2.04 SHOP FINISHING
PART 3
A.
Studs: Galvanize to G60 coating class.
B.
Tracks and Headers: Galvanize toG60 coating class.
C.
Accessories: Same finish as framing members.
EXECUTION
3.01 EXAMINATION
A.
Section 01300 - Administrative Requirements: Coordination and project conditions.
B.
Verify rough-in utilities are in proper location.
3.02 INSTALLATION
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A.
Align and secure top and bottom runners at minimum of 24 inches oc.
B.
Place two beads of sealant between runners and substrate and studs and adjacent
construction to achieve vapor seal.
C.
Install studs vertically at as shown on the contract drawings.
D.
Align stud web openings horizontally.
E.
Stud splicing not permissible.
F.
Fabricate corners using minimum of three studs.
G.
Double stud at wall openings, door and window jambs, not more than 2 inches from
each side of openings.
H.
Brace stud framing system rigid.
I.
Coordinate erection of studs with requirements of door frames, window frames, and
other miscellaneous openings; install supports and attachments.
05400-3
Section 05400
J.
Coordinate installation of wood blocking with electrical and mechanical work to be
placed within or behind stud framing.
K.
Extend stud framing to ceiling only. Attach ceiling runner as recommended my the
manufacturer
L.
Coordinate placement of insulation in stud spaces after stud frame erection.
3.03 ERECTION TOLERANCES
A.
Section 01400 - Quality Requirements: Tolerances.
B.
Maximum Variation From Indicated Position: 1/8 inch in 10 feet.
C.
Maximum Variation From Plumb: 1/8 inch in 10 feet.
END OF SECTION
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05400-4
SECTION 05500
METAL FABRICATIONS
PART 1
GENERAL
1.01 SUMMARY
A.
Section Includes
1.
Abrasive stair nosings for embedment in concrete stairways.
B.
Related Sections
1.
Section 03300 - Cast-In-Place Concrete: Placement of metal fabrications in
concrete.
2.
Section 09900 - Painting
1.02 PROJECT/SITE CONDITIONS
A.
PART 2
Verify that field measurements are as indicated on Drawings.
PRODUCTS
2.01 ACCEPTABLE MANUFACTURER - STAIR NOSINGS
A.
Wooster Products
Wooster, OH
Phone: (800) 321-4936
2.02 ABRASIVE STAIR NOSINGS
PART 3
A.
Material - Safety tread aluminum, 2-1/2" wide.
B.
Provide stair nosing 8 inches shorter than the length of the stairway unless shown
otherwise on the Drawings.
C.
Paint the back surface of the nosing with an alkali resistant bituminous coating to
protect it against corrosion.
EXECUTION
3.01 EXAMINATION
A.
Verify that field conditions are acceptable and are ready to receive work.
3.02 NOSING INSTALLATION
A.
Attach nosings by means of countersunk screws into anchors cast in each tread of all
concrete stairways.
END OF SECTION
1364002201
05500-1
SECTION 05515
ALUMINUM STAIRS
PART 1
GENERAL
1.01 REFERENCES
A.
AWS A2.0 - Standard Welding Symbols.
B.
AWS D1.1 - Structural Welding Code.
C.
ASTM B211 - Aluminum-Alloy Bars, Rods, and Wire.
D.
ASTM B221 - Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes.
1.02 SYSTEM DESCRIPTION
A.
Design Requirements
1.
Fabricate stair assembly to support live load of 100 lb/sq ft or point load of 300
lbs, whichever controls, with deflection of stringer or landing framing not to
exceed 1/360 of span.
1.03 SUBMITTALS
A.
Shop Drawings: Indicate profiles, sizes, connection attachments, reinforcing,
anchorage, size and type of fasteners, and accessories. Provide shop drawings
sealed by a Professional Structural Engineer experienced in design of this work and
licensed in the location of the project.
B.
Indicate welded connections using standard AWS A2.0 welding symbols. Indicate net
weld lengths.
1.04 QUALITY CONTROL
A.
Prepare Shop Drawings under direct supervision of a Professional Structural Engineer
experienced in design of this work and licensed in the location of the project.
1.05 PROJECT/SITE CONDITIONS
A.
PART 2
Verify that field measurements are as indicated on shop drawings.
PRODUCTS
2.01 MATERIALS
1364002201
A.
Structural Aluminum: Use new, standard sections of minimum weights shown,
conforming to Aluminum Association of America Standards for structural sections,
Alloy Type 6061.
B.
Bolts, Washers, and Nuts: Mark for quick identification, use ASTM Type 304 or 316
stainless steel.
05515-1
SECTION 05515
2.02 FABRICATION
A.
Fit and shop assemble in largest practical sections, for delivery to site.
B.
Fabricate components with joints tightly fitted and secured.
C.
Continuously seal jointed pieces by continuous welds.
D.
Grind exposed joints flush and smooth with adjacent finish surface. Make exposed
joints butt tight, flush, and hairline. Ease exposed edges to small uniform radius.
E.
Exposed Mechanical Fastenings: Flush countersunk screws or bolts; unobtrusively
located; consistent with design of component, except where specifically noted
otherwise.
F.
Supply components required for anchorage of fabrications. Fabricate anchors and
related components of same material and finish as fabrication, except where
specifically noted otherwise.
G.
Accurately form components required for anchorage of stairs, landings and railings to
each other and to building structure.
H.
Bolt treads to supports.
I.
Form hollow stringers with channels.
J.
Form landings with gratings of the same type as stair treads. Reinforce underside
with angles and/or channels to attain design load requirements.
2.03 FINISHES
A.
PART 3
After erection or assembly, air blast the entire structure with 100 mesh glass beads to
provide a uniform matte finish and to remove all markings and weld heat marks.
EXECUTION
3.01 EXAMINATION
A.
Verify that field conditions are acceptable and are ready to receive work.
B.
Beginning of installation means erector accepts existing conditions.
3.02 PREPARATION
A.
Prepare items where site welding is required.
B.
Supply items required to be cast into concrete or embedded in masonry with setting
templates, to appropriate sections.
3.03 INSTALLATION
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A.
Install items plumb and level, accurately fitted, free from distortion or defects.
B.
Provide anchors, plates, angles, hangers, and struts required for connecting stairs to
structure.
C.
Allow for erection loads, and for sufficient temporary bracing to maintain true
alignment until completion of erection and installation of permanent attachments.
05515-2
SECTION 05515
D.
Field weld components indicated on Drawings and/or on shop drawings. Perform field
welding in accordance with AWS D1.1.
E.
Field bolt and weld to match shop bolting and welding. Conceal bolts and screws
whenever possible. Where not concealed, use flush countersunk fastenings.
F.
Mechanically fasten joints butted tight, flush, and hairline. Grind welds smooth and
flush.
G.
Obtain ENGINEER approval prior to site cutting or making adjustments not scheduled.
H.
After erection, prime welds, abrasions, and surfaces not shop primed or galvanized,
except surfaces to be in contact with concrete.
3.04 ERECTION TOLERANCES
A.
Maximum Variation From Plumb: 1/4 inch per story, non-cumulative.
B.
Maximum Offset From True Alignment: 1/4 inch.
END OF SECTION
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05515-3
SECTION 05520
HANDRAILS AND RAILINGS
PART 1
GENERAL
1.01 SUMMARY
A.
Section Includes
1.
Anodized aluminum pipe handrails, balusters, and fittings.
B.
Related Sections
1.
Section 03300 - Cast-In-Place Concrete: Placement of anchors in concrete.
2.
Section 05510 - Metal Stairs.
3.
Section 09900 - Painting: Paint finish.
1.02 REFERENCES
A.
ASTM B211 - Aluminum-Alloy Bars, Rods, and Wire.
B.
ASTM B221 - Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes, and Tubes.
C.
ASTM B241 - Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube.
1.03 SYSTEM DESCRIPTION
A.
Design Requirements
1.
Railing assembly, wall rails, and attachments to resist lateral force of 75 lbs at
any point without damage or permanent set.
1.04 SUBMITTALS
A.
Submit under provisions of Section 01300.
B.
Shop Drawings: Indicate profiles, sizes, connection attachments, anchorage, size and
type of fasteners, and accessories. Provide shop drawings sealed by a Professional
Structural Engineer experienced in design of this work and licensed in the location of
the project.
C.
Product Data: Provide physical characteristics, performance data, and span and
deflection tables.
D.
Manufacturer's Installation Instructions: Indicate special requirements of opening and
perimeter framing.
1.05 PROJECT/SITE CONDITIONS
A.
PART 2
Verify that field measurements are as indicated on shop drawings.
PRODUCTS
2.01 ALUMINUM RAILING SYSTEM
1364002201
A.
Rails and Posts: 1-1/2 inch diameter, extruded tubing conforming to ASTM B241.
B.
Posts: 2-1/2” size, extruded tubing conforming to ASTM B241.
C.
Fittings: Elbows, T-shapes, wall brackets, escutcheons; cast or machined aluminum.
05520-1
SECTION 05520
D.
Splice Connectors: Collar with locking set screws; cast or machined aluminum.
E.
Fasteners: Stainless steel countersunk screws or bolts; consistent with design of
railing.
F.
Finish: Anodized.
2.02 FABRICATION
PART 3
A.
Fit and shop assemble components in largest practical sizes, for delivery to site.
B.
Fabricate components with joints tightly fitted and secured.
C.
Exposed Mechanical Fastenings: Flush countersunk screws or bolts; unobtrusively
located; consistent with design of component, except where specifically noted
otherwise.
D.
Supply components required for anchorage of fabrications. Fabricate anchors and
related components of same material and finish as fabrication, except where
specifically noted otherwise.
E.
Grind exposed joints flush and smooth with adjacent finish surface. Make exposed
joints butt tight, flush, and hairline. Ease exposed edges to small uniform radius.
F.
Accurately form components to suit stairs and landings, to each other, and to building
structure.
EXECUTION
3.01 EXAMINATION
A.
Verify that field conditions are acceptable and are ready to receive work.
B.
Beginning of installation means erector accepts existing conditions.
3.02 PREPARATION
A.
Clean and strip primed steel items to bare metal where site welding is required.
B.
Supply items required to be cast into concrete or embedded in masonry with setting
templates, to appropriate Sections.
3.03 INSTALLATION
A.
Install in accordance with manufacturer's instructions and Contract Drawings.
B.
Install components plumb and level, accurately fitted, free from distortion or defects.
C.
Provide anchors, plates, and angles required for connecting railings to structure.
Anchor railing to structure.
D.
Conceal bolts and screws whenever possible.
countersunk fastenings.
Where not concealed, use flush
3.04 TOLERANCES
A.
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Maximum Variation From Plumb: 1/4 inch per story, non-cumulative.
05520-2
B.
1364002201
SECTION 05520
Maximum Offset From True Alignment: 1/4 inch.
END OF SECTION
05520-3
SECTION 05531
ALUMINUM GRATINGS
PART 1
GENERAL
1.01 SUMMARY
A.
Section Includes
1.
Aluminum stair tread gratings.
2.
Aluminum floor gratings.
B.
Related Sections
1.
Section 05510 - Metal Stairs: Framing for grating and stair treads.
2.
Section 05520 - Handrails and Railings.
3.
Section 09900 - Painting: Field paint finish.
1.02 REFERENCES
A.
ASTM A202.1 - Metal Bar Grating Manual for Steel and Aluminum Gratings and Stair
Treads.
B.
ASTM B221 - Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Shapes,
and Tubes.
C.
ANSI/NAAMM MBG 531 - Metal Bar Grating Manual
1.03 SYSTEM DESCRIPTION
A.
Design Requirements
1.
Design Live Load: Uniform load of 150 lb/sq ft minimum.
2.
Maximum Allowable Deflection Under Live Load: 1/360 up to 1/4 inch.
1.04 SUBMITTALS
A.
Submit under provisions of Section 01300.
B.
Shop Drawings: Submit detailed shop drawings for the fabrication and installation of
the grating including layout, arrangement, tolerances, and accessories.
C.
Product Data: Provide physical characteristics, performance data, and span and
deflection tables.
D.
Manufacturer's Installation Instructions: Indicate special requirements of opening and
perimeter framing.
1.05 QUALITY ASSURANCE
A.
Design gratings under direct supervision of a Professional Structural Engineer
experienced in design of this work.
1.06 PROJECT/SITE CONDITIONS
A.
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Verify that field measurements are as indicated on shop drawings.
05531-1
SECTION 05531
1.07 SEQUENCING AND SCHEDULING
A.
PART 2
Coordinate the work with placement of frames, tolerances for placed frames, and
openings.
PRODUCTS
2.01 MATERIALS
A.
Aluminum For Pressure Locking or Riveting: ASTM B221, extruded or ASTM B210,
drawn seamless tubular aluminum alloy, of shapes indicated.
2.02 ACCESSORIES
A.
Provide aluminum saddle clips or anchor blocks for grating hold down.
B.
Perimeter Closure: of same material as grating.
2.03 FABRICATION
A.
Grating Type: ANSI/NAAMM MBG 531, Pressure Locked or Riveted Type.
B.
Fabricate grates to accommodate design loads.
C.
Provide all ends of grating sections and openings in grating with banding bars of the
same height and material as the grating.
D.
Fabricate support framing for openings.
E.
Top Surface: Serrated, Non-slip.
2.04 FINISHES
A.
PART 3
Aluminum: Anodized.
EXECUTION
3.01 EXAMINATION
A.
Verify that opening sizes and dimensional tolerances are acceptable.
B.
Verify that supports and anchors are correctly positioned.
3.02 INSTALLATION
A.
Install components in accordance with manufacturer's instructions.
B.
Place frames in correct position, plumb and level.
C.
Secure to prevent movement.
3.03 TOLERANCES
A.
Conform to ANSI/NAAMM MBG 531.
END OF SECTION
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05531-2