Aluminum Grating Spacing & Load Tables Help You Know Gratings Better

Aluminum Grating Spacing Table

Part No.	Spacing	Open Area*	Description
19-SG-4 19-SGI-4 19-SGF-4 19-ADT-4		78%	Bearing bars spaced at 1-3/16" on center and cross bars at 4" on center; The workhorse of industrial flooring popular for platforms, catwalks, mezzanines and stairways.
19-SG-2 19-SGI-2 19-SGF-2 19-ADT-2		73%	Bearing bars spaced at 1-3/16" on center and cross bars at 4" on center; Excellent for short spans and applications where additional lateral stability is desired.
15-SG-4 15-SGI-4 15-SGF-4 15-ADT-4		75%	Bearing bars spaced at 15/16" on center and cross bars at 4" on center; More than 26% stronger than similar "19" spaced gratings and provides additional flooring surface.
15-SG-2 15-SGI-2 15-SGF-2 15-ADT-2		69%	Bearing bars spaced at 15/16" on center and close spaced cross bars at 2" on center; Provides the advantage of closer spaced bearing bars and cross bars.
11-SG-4 11-SGI-4 11-SGF-4 11-ADT-4		68%	With bearing bars spaced at 11/16" on center, 11-4 and 11-2 gratings with 3/16" thick bearing bars comply with the spacing requirements of the Americans with Disabilities Act. For ADA installations, specify that the bearing bars span perpendicular to the normal flow of traffic.
11-SG-2 11-SGI-2 11-SGF-2 11-ADT-2		63%
8-SG-4 8-SGI-4 8-SGF-4 8-ADT-4		58%	The bar spacing on 8-4 and 8-2 gratings comply with ADA spacing requirements. In addition to pedestrian applications, these products are popular for material handling platforms and mezzanines subject to continuous cart and dolly traffic.
8-SG-2 8-SGI-2 8-SGF-2 8-ADT-2		54%
7-SG-4 7-SGI-4 7-SGF-4 7-ADT-4		53%	The bar spacing on 7-4 and 7-2 gratings comply with ADA spacing requirements and are popular for applications in the public way. When specified with 3/16" thick bearing bars, 7-4 and 7-2 gratings have a net 1/4" clear opening between the bearing bars and often reject intrusion by high-heeled shoes.
7-SG-2 7-SGI-2 7-SGF-2 7-ADT-2		49%

* Percentage of open area is based upon 3/16" thick bearing bars and 0.275 cross bars. Contact us if exact open area calculation is required for alternative bearing bar thickness or cross bar sizes.

Where, SG stands for swaged rectangular bar grating; SGI stands for swaged I-bar grating; SGF stands for swaged flush top grating; ADT stands for aluminum dovetail pressure locked grating.

7 Space Load Table

*Weight per square foot based upon 7-SG-4 grating. Add 0.30 psf for 2" on center cross bars.

**Maximum pedestrian load is defined as a 100# Uniform Load with deflection ≤ 1/4 inch. The 1/4" maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Note: When gratings with serrated surface are specified, the depth of the grating required for a specific load will be 1/4" greater than that shown in these tables.

Panel Widths

Grating panels are available from stock in nominal 24" and 36" widths. When considering alternative widths, consult this table to select widths that will maintain uniform "out-to-out" spacing of the bearing bars. Specified widths deviating from this table will be fabricated to size with side banding and the bar spacing on one side of the finished panel will deviate from the spacing throughout the remainder of the panel.

Panel widths indicated are for gratings with 3/16" thick bearing bars. For 1/8" thick bearing bars deduct 1/16" from the stated values. Add 1/4" to all dimensions for extended cross bars on all aluminum products.

8 Space Load Table

*Weight per square foot based upon 8-SG-4 grating. Add 0.30 psf for 2" on center cross bars.

**Maximum pedestrian load is defined as a 100# Uniform Load with deflection ≤ 1/4 inch.

The 1/4" maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Note: When gratings with serrated surface are specified, the depth of the grating required for a specific load will be 1/4" greater than that shown in these tables.

Panel Widths

Grating panels are available from stock in nominal 24" and 36" widths. When considering alternative widths, consult this table to select widths that will maintain uniform "out-to-out" spacing of the bearing bars. Specified widths deviating from this table will be fabricated to size with side banding and the bar spacing on one side of the finished panel will deviate from the spacing throughout the remainder of the panel.

Panel widths indicated are for gratings with 3/16" thick bearing bars. For 1/8" thick bearing bars deduct 1/16" from the stated values. Add 1/4" to all dimensions for extended cross bars on all aluminum products.

11 Space Load Table

*Weight per square foot based upon 11-SG-4 grating. Add 0.30 psf for 2" on center cross bars.

**Maximum pedestrian load is defined as a 100# Uniform Load with deflection ≤ 1/4 inch.

The 1/4" maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Note: When gratings with serrated surface are specified, the depth of the grating required for a specific load will be 1/4" greater than that shown in these tables.

Panel Widths

Grating panels are available from stock in nominal 24" and 36" widths. When considering alternative widths, consult this table to select widths that will maintain uniform "out-to-out" spacing of the bearing bars. Specified widths deviating from this table will be fabricated to size with side banding and the bar spacing on one side of the finished panel will deviate from the spacing throughout the remainder of the panel.

Panel widths indicated are for gratings with 3/16" thick bearing bars. For 1/8" thick bearing bars deduct 1/16" from the stated values. Add 1/4" to all dimensions for extended cross bars on all aluminum products.

15 Space Load Table

*Weight per square foot based upon 15-SG-4 grating. Add 0.30 psf for 2" on center cross bars.

**Maximum pedestrian load is defined as a 100# Uniform Load with deflection≤1/4 inch.

**The 1/4" maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Note: When gratings with serrated surface are specified, the depth of the grating required for a specific load will be 1/4" greater than that shown in these tables.

Panel Widths

Grating panels are available from stock in nominal 24" and 36" widths. When considering alternative widths, consult this table to select widths that will maintain uniform "out-to-out" spacing of the bearing bars. Specified widths deviating from this table will be fabricated to size with side banding and the bar spacing on one side of the finished panel will deviate from the spacing throughout the remainder of the panel.

Panel widths indicated are for gratings with 3/16" thick bearing bars. For 1/8" thick bearing bars deduct 1/16" from the stated values. Add 1/4" to ail dimensions for extended cross bars on all aluminum products.

19 Space Load Table

*Weight per square foot based upon 19-SG-4 grating. Add 0.30 psf for 2" on center cross bars.

**Maximum pedestrian load is defined as a 100# Uniform Load with deflection ≤ 1/4 inch.

The 1/4" maximum deflection criteria is considered consistent with pedestrian comfort, but may be exceeded for other loading conditions at the discretion of the specifying authority.

Note: When gratings with serrated surface are specified, the depth of the grating required for a specific load will be 1/4" greater than that shown in these tables.

Panel Widths

Grating panels are available from stock in nominal 24" and 36" widths. When considering alternative widths, consult this table to select widths that will maintain uniform "out-to-out" spacing of the bearing bars. Specified widths deviating from this table will be fabricated to size with side banding and the bar spacing on one side of the finished panel will deviate from the spacing throughout the remainder of the panel.

Panel widths indicated are for gratings with 3/16" thick bearing bars. For 1/8" thick bearing bars deduct 1/16" from the stated values. Add 1/4" to ail dimensions for extended cross bars on all aluminum products.