SECTION 055300
LIGHT DUTY LIONHEARTED STEEL GRATINGS
***** The Mat King, a d/b/a of Geoffrey Drew Marketing, Inc. supplies several basic construction materials including steel, stainless steel and aluminum bar gratings, safety gratings, stair treads, and fiberglass gratings.
This guide can be used to specify various light duty carbon steel bar gratings. These can be used for platforms, stairs treads and handrails, trench covers, security fences and many other applications. Light duty carbon steel bar gratings can be specified as a separate section or as part of another building element. For the later, paragraphs from this guide would be inserted into the section specifying the element constructed with light duty carbon steel gratings. *****
The specifier will need to edit this product specification to reflect the options and applications being used. Most editing can be accomplished by deleting unnecessary requirements. Options are indicated by [ ].
Please Note: For final editing, all brackets and notes will need to be deleted from the guide.
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Part 1: General
1.1 Scope
The contractor shall provide all labor, materials, equipment and incidentals as shown, specified and required to furnish and install grating, stair treads and frames.
1.2 Quality Assurance
A.1 Manufacturer Qualification: A company specializing in the manufacturing of metal bar gratings with not less than 10 years of documented experience.
A.2 Comply with applicable provisions and recommendations of the following: NAAMM Metal Bar Grating Manual designated ANSI/NAAMM MBG 531 (Aluminum and Light Duty Steel and Stainless Steel Grating) and ANSI/NAAMM MBG 532 (Heavy Duty Steel Grating).
A.3 Light Duty Steel:
ASTM A1011 for hot rolled carbon steel sheet and strip. ASTM A510 for carbon steel wire rods and coarse round wire. ASTM A666 for stainless steel
B.1 Take field measurements prior to preparation of final shop drawings and fabrication where required to ensure proper fitting of the work.
1.3 References
A. ASTM A1011/A-04 Standard Specification for Steel Sheet and Strip
B. AISI 1008 Standard Low Carbon Steel
C. ANSI/NAAMM-MBG-531-00 Metal Bar Grating Manual
D. ASTM A-123 Standard Specification for Zinc Hot-Dip Galvanized Products.
1.4 Submittals
A. The contractor shall submit for approval shop drawings for the fabrication and erection of all work. Include plans, elevations, and details of sections and connections. Show type and location of all fasteners.
B. The contractor shall submit the manufacturer’s specifications, load tables, anchor details and standard installation details.
C. Samples of grating and anchorage system shall be submitted for approval.
Part 2: Product
General:
Design is based upon use of gratings as supplied by The Mat King, a d/b/a of Geoffrey Drew Marketing, Inc. and terminology used herein may include reference to the specific performance or product of this supplier. Such reference shall be construed only as establishing the quality of materials, operational features and workmanship to be used under this Section and shall not, in any way, be construed as a way to limit competition.
1. Grating: Lionhearted Steel Grating series as supplied by The Mat King, a d/b/a of Geoffrey Drew Marketing, Inc., or equal.
2. Bearing Bars: Carbon steel rectangular bar [1”, 1-1/8”, 1-1/4”, 1-3/8”, 1-1/2”, 1-5/8”, 1-3/4”, 2”] depth x [16 gauge, 14 gauge, 12 gauge, 3/16”] width on an increment of 7/16” up to a maximum of 3-15/16” centers. (Note other spacing may be specified at the discretion of the architect/engineer.)
3. Cross Bars: Carbon steel rectangular bar mechanically locked by hydraulic pressure lock at right angles to, and in the same plane as, top surface of bearing bars at increment of 7/16” up to a maximum of 3-15/16” on center. (Note other cross bar spacing may be specified at the discretion of the architect/engineer.)
4. Surface: [Plain, Serrated].
5. Loading: Grating to carry a pedestrian loading equal to a uniform load of 100# per square foot over the required clear span with deflection not to exceed ¼”. (Note: alternate loading requirements may be specified at the discretion of the architect/engineer.)
6. Finish: The gratings shall be provided [Mill, Shop Black Pain, Galvanized after Fabrication, Powder Coated].
7. Fabrication and Tolerances shall be in accordance with ANSI/ NAAMM Metal Bar Grating Manual.
Part 3: Execution
3.1 Installation
A. Prior to grating installation, contractor shall inspect supports for correct size, layout and alignment. Any inconsistencies between contract drawings and supporting structure deemed detrimental to grating placement shall be reported in writing to the architect or owner’s agent prior to placement.
B. Install grating in accordance with shop drawings and standard installation clearances as recommended by ANSI / NAAMM Metal Bar Grating Manual.
C. Cutting, Fitting and Placement.
1. Perform all cutting and fitting required for installation. Grating shall be placed such that cross bars align.
2. Wherever grating is pierced by pipes, ducts and structural members, cut openings neatly and accurately to size and weld a rectangular band bar of the same height and material as the bearing bars.
3. Cutouts for circular obstructions are to be at least 2” larger in diameter than the obstruction.
4. Utilize standard panel widths wherever possible.
D. Protection of Aluminum from Dissimilar Materials:
1. Where aluminum surfaces come into contact with dissimilar metals, surfaces shall be kept from direct contact by painting the dissimilar metal with one coat of bituminous paint or other approved insulating material.
2. Where aluminum surfaces come into contact with dissimilar materials such as concrete, masonry or lime mortar, exposed aluminum surfaces shall be painted with one coat of bituminous paint or other approves insulating material.
3.2 Grating Attachment
Use approved attachment system and fasteners to secure grating to supporting members as shown on plans.
End Section 055300
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THE
MAT KING
740 West End Avenue; Suite 1
New York, NY 10025 USA
Phone: (646)998-4208
Fax: (646)998-4073
Phone: 800-442-6544
Fax: 800-Mats-Fax (628-7329)
Phone: 800-442-6544
Fax: 800-Mats-Fax (628-7329)
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