Perf-O Grip® Specifications

Perf-O Grip® Safety Grating Specifications

Notes to architect:

  1. Perf-O Grip® and Perf-O Grip® 2 gratings are intended for general purpose use in plants and process facilities by industry, commerce, and public utilities, and on air, water, and surface, for both mobile and stationary equipment.
  2. Perf-O Grip® and Perf-O Grip® 2 stair treads are intended for utility stairs and fire escapes in commercial, public and private buildings where local code permits. They are not intended for staircases used regularly by the general public where flat closed surfaces are desired. For this type of application, see Traction-Tread® stair treads and sheets.
  3. These specifications are presented as a general guide to the architect or structural engineer in preparing project specifications. Allowable loads, spans and other limiting conditions presented in this catalog offer product data for use in design and construction.
  4. All supports should provide a smooth, level, 11/2” minimum bearing surface, free of burrs, bridging, welds or other irregularities.
  5. Random cut ends and diagonal or circular cut exposed edges should be banded with a bar at least 1/8” thick and equal to the overall side channel depth of grating welded at contact points at the discretion of the design engineer.
  6. Bolted connections, except stair or ladder tread attachment to stringer channels, may be replaced by welded connections that develop the same strength.

Part 1: General

  • Scope: The contractor shall furnish and install Perf-O Grip® and Perf-O Grip® 2 Gratings and Stair Treads, as specified and shown on the drawings.
  • Qualifications: Perf-O Grip® and Perf-O Grip® 2 Gratings, Stair Tread and accessories, unless otherwise indicated, shall be manufactured by Eaton’s B-Line Business, and shall be installed in accordance with its current printed directions. Safety surface shall be slip-resistant in all directions.
  • Submittals: The contractor shall furnish shop drawings of grating layout, framing and supports, unit dimensions and sections, type and location of fasteners and welds.
  • Storage and Handling: All materials shall be stored and handled to avoid damage. Damaged materials shall be removed from the premises.

Part 2: Products

2.1 Grating Materials

a. Type: (Perf-O Grip® and Perf-O Grip® 2 Gratings) (Perf-O Grip® Walkways)

b. Metal and Finish: Standard (mill-galvanized steel, ASTM A924) (stainless steel, alloy Types 304-2B/D) (aluminum, alloy 5052 H32); Special order (carbon steel — hot rolled, pickled and oiled, ASTM-A569) (stainless steel, alloy Type 316-2B/D)

c. Metal gauge: (13-ga. steel) (11-ga. steel) (16-ga. stainless steel) ( .125” aluminum)

d. Section width: (5”) (7”) (10”) (12”) (18”) (24”) (30”) plank; (24”) (30”) (36”) walkway

e. Channel height: Safety Grating (11/2”) (2”) (3”) (4”) plank; (5”) Walkway Grating – OSHA compliant; Canadian OH & S Compliant

f. Standard lengths: (10’-0”) (12’-0”)

2.2 Stair Tread Materials

a. Type: (Perf-O Grip® and Perf-O Grip® 2 Stair Tread)

b. Metal and Finish: Standard (mill-galvanized steel, ASTM A924) (stainless steel, alloy Types 304-2B/D) (aluminum, alloy 5052 H32); Special order (carbon steel — hot rolled, pickled and oiled, ASTM-A1011) (stainless steel, alloy Type 316-2B/D)

c. Metal gauge: (13-ga. steel) (11-ga. steel) (16-ga. stainless steel) ( .125” aluminum)

d. Tread Depth: Standard (10”); Special Order (5”) (7”) (12”)

e. Channel height: Standard (11/2”); Special Order (2”)

f. Span or Width of Staircase: (24”) (30”) (36”) 2.3

2.3 Accessories

a. Bolt Seats: Standard (mill-galvanized steel, ASTM A924); Special order (carbon steel — hot rolled, pickled and oiled, ASTM A569) (aluminum, alloy 5052-H32); (stainless steel, alloy Types 304-2B/D) (stainless steel, alloy Type 316-2B/D)

b. “J” Clip Attachment: Standard (mill-galvanized steel, ASTM A924); Special order (carbon steel — hot rolled, pickled and oiled, ASTM A569) (aluminum, alloy 5052-H32); (stainless steel, alloy Types 304-2B/D) (stainless steel, alloy Type 316-2B/D)

c. Midsupport Clip: Standard (mill-galvanized steel, ASTM A924); Special order (carbon steel — hot rolled, pickled and oiled, ASTM A1011) (aluminum, alloy 5052-H32); (stainless steel, alloy Types 304-2B/D) (stainless steel, alloy Type 316-2B/D)

d. Surface Splice Kit: Standard (mill-galvanized steel, ASTM A924); Special order (carbon steel — hot rolled, pickled and oiled, ASTM A1011) (aluminum, alloy 5052-H32); (stainless steel, alloy Types 304-2B/D) (stainless steel, alloy Type 316-2B/D)

e. Walkway Splice Kit: Standard (mill-galvanized steel, ASTM A924); Special order (carbon steel — hot rolled, pickled and oiled, ASTM A1011) (aluminum, alloy 5052-H32); (stainless steel, alloy Types 304-2B/D) (stainless steel, alloy Type 316-2B/D)

f. Universal Handrail Bracket for Walkways: Eliminates unnecessary substructure for supporting handrail posts.

Part 3: Execution

3.1 Condition of surfaces

Prior to grating installation, contractor shall inspect supports for correct size, layout and alignment and verify that surfaces to receive grating are free of debris. The contractor shall report to the design or consulting engineer or owner’s agent in writing any defects considered detrimental to proper application of grating so defects can be remedied before grating is applied.

3.2 Grating installation

Install grating in accordance with manufacturer’s recommendations and shop drawings. Position grating sections flat and square with ends bearing min. 11/2” on supporting structure. Keep grating sections at least 1/4” away from vertical steel sections and 1/2” from concrete walls. Installation clearances are built into this product. Allow clearance at joints between sections of max. 1/4” at side channels and max. 3/8” at ends. When specified, band random cut ends and diagonal or circular cut exposed edges with a min. 1/8” thick bar welded at contact points.

3.3 Grating attachment

Attach grating to supports without warp or deflection as follows:

a. Single plank application: Secure plank ends to supporting members at every point of contact. Use(2) Perf-O Grip® Bolt Seats or “J” Clip Assemblies at each end or secure both side channels at each end to supports by fusion welding with 1/8” fillet welds, 1” long.

b. Multiple plank application: Secure perimeter plank to supporting members at every point of contact and intermediate grating sections with at least (1) attachment each end of plank, on alternate sides. For added rigidity when span exceeds (6’-0”) (8’-0”), attach side channels of adjacent plank together (at mid-point of span) using mid support clip.

c. Welded attachment: Secure side channels to supports by fusion welding with 1/8” fillet welds, 1” long. Weld adjacent planks together with 1/8” fillet welds, 1” long, 24” o.c. staggered top and bottom.

d. Clip attachment: Secure intermediate planks to supports using Bolt Seat and “J” Clip Assembly. Use Bolt Seat with 3/8” carriage bolts and nuts for securing perimeter planks. Fasten adjacent side rails together with mid support clip or 3/8” machine bolts and nuts through locally drilled holes.

3.4 Stair Tread Installation

Install Perf-O Grip® and Perf-O Grip® 2 stair treads as shown on the drawings. Fasten treads to stair stringers with 3/8” x 1” machine bolts and nuts. a. For stair treads, intermediate stringer is recommended for spans over 4 feet.