Voids Created by Various Sizes
|
Depth of
Steelform |
Cubic feet of concrete per LF
(for various widths of flangeforms) |
|||||
|
53″ Wide
|
30″ Wide
|
20″ Wide
|
15″ Wide
|
10″ Wide
|
||
|
8″
|
N/A
|
N/A
|
1.63
|
1.07
|
0.79
|
0.52
|
|
10″
|
N/A
|
N/A
|
2.02
|
1.33
|
0.98
|
0.63
|
|
12″
|
N/A
|
N/A
|
2.41
|
1.58
|
1.17
|
0.75
|
|
14″
|
6.29
|
N/A
|
2.80
|
1.83
|
1.34
|
.086
|
|
16″
|
7.17
|
5.73
|
3.18
|
2.07
|
1.52
|
0.96
|
|
20″
|
8.92
|
7.13
|
3.93
|
2.54
|
1.85
|
1.16
|
|
24″
|
10.67
|
8.50
|
4.67
|
3.00
|
2.17
|
1.33
|
Flangeforms are installed by lapping 2′, 3′ and 4′ segments over one another to create a void length specified by the design engineer. While they are capable of providing the structural profile required, the lapping of the forms creates offsets that create a class “D” finish (up to 1″ offsets)
If the finish required is better than a class “D”, then some other type of form should be specified.
Concrete Quantities – 30″ Widths*
|
Depth of
Steelform |
Width of Joist
|
Cubic feet of concrete per slab foot
for various slab thicknesses |
Additional concrete for Tapered Endforms, cu. ft. per lin. foot of bearing wall or beam (one side only)
|
||
|
2 1/2″
|
3″
|
4 1/2″
|
|||
|
8″
|
5″ |
0.317
0.333 0.347 |
0.359
0.374 0.389 |
0.484
0.499 0.514 |
0.143
0.139 0.135 |
|
10″
|
5″
6″ 7″ |
0.348
0.367 0.386 |
0.390
0.409 0.427 |
0.515
0.534 0.552 |
0.179
0.174 0.169 |
|
12″
|
5″
6″ 7″ |
0.381
0.404 0.425 |
0.422
0.445 0.467 |
0.547
0.570 0.592 |
0.214
0.208 0.203 |
|
14″
|
5″
6″ 7″ |
0.415
0.441 0.467 |
0.456
0.483 0.508 |
0.581
0.608 0.633 |
0.250
0.243 0.236 |
|
16″
|
6″
7″ 8″ |
0.481
0.509 0.537 |
0.522
0.551 0.578 |
0.647
0.676 0.703 |
0.278
0.270 0.236 |
|
18″
|
6″
7″ 8″ |
0.521
0.553 0.583 |
0.563
0.595 0.625 |
0.688
0.720 0.750 |
0.313
0.304 0.296 |
|
20″
|
6″
7″ 8″ |
0.564
0.609 0.633 |
0.606
0.641 0.675 |
0.731
0.776 0.800 |
0.347
0.338 0.329 |
|
24″
|
6″
7″ 8″ |
0.653
0.695 0.735 |
0.694
0.736 0.776 |
0.819
0.861 0.901 |
0.417
0.405 0.395 |
*Apply only for areas over flangeforms and joists between them.
Bridging joists, special headers, beam tees, etc., are not included
Concrete Quantities – 20″ Widths*
|
Depth of
Steelform |
Width of Joist
|
Cubic feet of concrete per slab foot
for various slab thicknesses |
Additional concrete for Tapered Endforms, cu. ft. per lin. foot of bearing wall or beam (one side only)
|
||
|
2 1/2″
|
3″
|
4 1/2″
|
|||
|
8″
|
5″ |
0.361
0.381 |
0.402
0.422 |
0.527
0.547 |
0.200
0.192 |
|
10″
|
5″
6″ |
0.401
0.427 |
0.442
0.468 |
0.567
0.593 |
0.250
0.240 |
|
12″
|
5″
6″ 8″ |
0.447
0.481 0.534 |
0.488
0.522 0.575 |
0.613
0.647 0.700 |
0.300
0.288 0.268 |
|
14″
|
5″ 7″ |
0.496
0.530 0.561 |
0.538
0.572 0.603 |
0.663
0.697 0.728 |
0.350
0.337 0.324 |
|
16″
|
5″ 7″ |
0.584
0.620 0.653 |
0.626
0.662 0.694 |
0.751
0.787 0.819 |
0.385
0.370 0.357 |
|
18″
|
5″
6″ 8″ |
0.641
0.681 0.717 |
0.683
0.722 0.759 |
0.808
0.847 0.884 |
0.433
0.417 0.402 |
|
20″
|
5″
6″ 8″ |
0.700
0.743 0.784 |
0.741
0.785 0.825 |
0.867
0.910 0.950 |
0.481
0.463 0.446 |
|
24″
|
5″
6″ 8″ |
0.824
0.875 0.923 |
0.865
0.917 0.964 |
0.990
1.042 1.089 |
0.577
0.556 0.536 |
*Apply only for areas over flangeforms and joists between them.
Bridging joists, special headers, beam tees, etc., are not included