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Aluminum I-Bar Stair Treads

Swaged

•Maximum Tread Lengths
•End Plate Dimensions
•Tread Width Including Nosing
•Weight Table Per Inch of Tread Length

 

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 length.

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End Plate Dimensions

19AI4
1-3/16" Center to Center of Bearing Bars
Grating Depth Up to 1-1/4" 1-1/2" to 1-3/4"

Dimension "B"

1-3/4"

2-1/4"

Dimension "C"

2-1/2"

3"

Dimension "A":  See Tread Width

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Tread Width Including Nosing

19AI4
1-3/16" Center to Center of Bearing Bars

No. of Bearing Bars

 Bearing Bar Depth

Bolt Hole Spacing
Dimension "A"
1/4"

Tread Width

5

6-1/4"

2-1/2"
6

7-7/16"

4-1/2"
7

8-5/8"

4-1/2"
8

9-13/16"

7"
9

11"

7"
10

12-3/16"

7"

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Weight Table per Inch of Tread Length

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/SN

 .11 .13 .14 .15
CA .15 .16 .18 .19
6

G/SN

 .13 .15 .17 .18
CA .17 .18 .20 .22
7

G/SN

 .15 .17 .19 .21
CA .19 .20 .23 .24
8

G/SN

 .17 .19 .22 .24
CA .21 .23 .25 .27
9

G/SN

 .19 .21 .24 .27
CA .23 .25 .28 .30
10

G/SN

 .21 .24 .27 .30
CA .25 .27 .30 .33

*G/SN = Grooved Nose; CA = Cast Iron/Aluminum Abrasive Nosing

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