NAAMM is the National Association of Architectural Metal Manufacturers.  They develop and distribute manuals, specifications, and other materials used for building construction.  When purchasing or specifying steel grating according to NAAMM’s standards, the following should be included:

• Description of Grating: The standard marking system is composed of 5 items:
  • Type of grating (welded, riveted, or pressure locked)
  • Bearing Bar Spacing
  • Cross Bar or Rivet Spacing
  • Size of Bearing Bars
  • Type of material
• Drawing(s): The drawing(s) must show:
  • The dimensions
  • Span of the bearing bars
  • Method of support
  • Any cutouts
• Anchorage: There are various different ways to anchor steel grating into place.  The following are a list of the ways to anchor steel grating:
  • Welded Anchorage:  Welded anchorage is done in the field.  The steel grating is welded into place, making the grating permanent in that location.
  • Saddle Clips:  Saddle clips are used when steel grating is installed with the possibility of being removed at a later time.  You can purchase saddle clips from a grating manufacturer.
  • Weld Lugs:  Weld lugs are also used when steel grating is installed with the possibility of being removed at a later time.  Weld lugs are shop welded to bearing bars and they have to be specified when ordering the steel grating.
  • Other:  Other types of anchorage that have been tested and approved for use with steel grating may be used.  Included are top-mounting mechanical friction anchors which allow you to install them without accessing the grating from below.  These types of anchors can be removed and are recommended if the steel grating will be removed frequently.
• Finish:  Steel grating can come in three different finish types, mill, painted, or galvanized.  When specifying steel grating, you must think about the application in which it will be used.  If steel grating is in an environment where it is exposed to moisture, it must be protected from rust or corrosion by either painting or galvanizing.

How to Specify or Order SlipNOT® Steel Grating

SlipNOT® Metal Safety Flooring provides high traction, non-slip steel grating to industries such as manufacturing, industrial, oil and gas, food and beverage, and the Government among others.  When specifying or purchasing steel grating coated with SlipNOT® you must include the following:

• Finish:  SlipNOT® steel grating is available in a mill finish, a painted finish or can be hot dipped galvanized for protection against corrosion.
• Grade:  SlipNOT® steel grating is available in three different grades:
  • Grade 1 (Fine): Grade 1 is a light duty surface with minimum surface roughness.
  • Grade 2 (Medium):  Grade 2 is a medium surface and is applicable for nearly every situation.
  • Grade 3 (Course):  Grade 3 is has the heaviest traction and is used in the most demanding environments.
• Tolerances:  Steel grating is available in the following tolerances: + or – ¼” for custom fabricated orders or Mill tolerance for stock sizes.
• Quantity:  The amount of steel grating needed.
• Width:  Steel grating comes in widths of either 2’ or 3’.
• Length:  Steel grating is available in lengths of 20’ to 24’.
• Bearing Bar and Cross Bar Size: The following sizes are available for SlipNOT® steel grating:
  • ¾” x 3/16”
  • 1” x 3/16”
  • 1 ¼” x 3/16”
  • 1 ½” x 3/16”
  • 1 ¾” x 3/16”
  • 2” x 3/16”
  • Other
• Style:  The following styles are offered for SlipNOT® steel grating:
  • 19-2
  • 19-4
  • 15-2
  • 15-4
  • 11-4
  • 7-4
  • Other
• Material Supplied:  You must specify if you will be providing the steel grating (customer supplied) or if you will be using SlipNOT® supplied steel grating.
• Any Additional Details:  You may also include any additional details that were not mentioned above, such as drawings or additional sizes and quantities.