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Brown-Campbell Company
Brown-Campbell Company
800-472-8464
Specialty Steel Manufacturer,
Fabricator & Distributor Since 1952
Product Information

Bar Grating Stair Treads

Aluminum I-Bar - Tread Length Design Details

Aluminum I-Bar - Tread Length Design Details

Swaged

Maximum Tread Lengths*
19AI4
1-3/16" Center to Center of Bearing Bars
Bearing
Bar Size
Plain
1” x 1/4” 2’-4”
1-1/4”x 1/4” 2’-10”
1-1/2” x 1/4” 3’-6”
1-3/4” x 1/4” 4’-3”

* Maximum tread length based on 300 lb. concentrated load on front 5 in. of tread at center of tread length and deflection limitation of 1/240 of length.

Weight Per Inch of Tread Length (lbs)
19AI4
1-3/16" Center to Center of Bearing Bars
No. of
Bearing Bars
Nosing* 1” x 1/4” 1-1/4” x 1/4” 1-1/2” x 1/4” 1-3/4” x 1/4”
5 G/AC .11 .13 .14 .15
CA .15 .16 .18 .19
6 G/AC .13 .14 .17 .18
CA .17 .18 .20 .22
7 G/AC .15 .17 .19 .21
CA .19 .20 .23 .24
8 G/AC .17 .19 .22 .24
CA .21 .23 .25 .27
9 G/AC .19 .21 .24 .27
CA .23 .25 .28 .30
10 G/AC .21 .24 .27 .30
CA .25 .27 .30 .33

* G/AC = Grooved Nose/Abrasive Coated Nosing
* CA = Cast Aluminum Abrasive Nosing