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I-Joist
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Flange Width Of PRI-400 Joists
- APA Performance Rated I-Joists are identified by their depth in inches
followed by a designation such as PRI-30 which relates to the joist
strength and stiffness.
- The higher the number following the letters PRI, the greater the strength
and stiffness of the I-Joist.
| Net
Depth |
Joist
Designation |
Flange
Width |
| 9-1/2" (241 mm) |
PRI-20 |
1-1/2" (38.1 mm) |
| PRI-30 |
| PRI-40 |
2-1/2" (63.5 mm) |
| PRI-50 |
1-3/4" (44.5 mm) |
| PRI-60 |
2-1/2" (63.5 mm) |
| 11-7/8" (302 mm) |
PRI-20 |
1-1/2" (38.1 mm) |
| PRI-30 |
| PRI-40 |
2-1/2" (63.5 mm) |
| PRI-50 |
1-3/4" (44.5 mm) |
| PRI-60 |
2-1/2" (63.5 mm) |
| PRI-70 |
2-5/16" (58.7 mm) |
| PRI-80 |
3-1/2" (88 9 mm) |
| 14" (356 mm) |
PRI-40 |
2-1/2" (63.5 mm) |
| PRI-50 |
1-3/4" (44.5 mm) |
| PRI-60 |
2-1/2" (63.5 mm) |
| PRI-70 |
2-5/16" (58.7 mm) |
| PRI-80 |
3-1/2" (88.9 mm) |
| 16" (406 mm) |
PRI-40 |
2-1/2" (63.5 mm) |
| PRI-50 |
1-3/4" (44.5 mm) |
| PRI-60 |
2-1/2" (63.5 mm) |
| PRI-70 |
2-5/16" (58.7 mm) |
| PRI-80 |
3-1/2" (88.9 mm) |
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