Independent Lab-Tested Live Load Capacities for Joist Grip Clamps
Each Chicago Clamp System® has been designed, and then rigorously tested by an independent engineering lab, to provide a product on which you can depend.
Joist Grip Framing Clamp System
Allowable Load (pounds) vs. Span a-h
| Tube Size (inches) | Load Type | Span (feet) | |||||||
| 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | ||
| HSS 4" x 2" x 1/8" | concentrated | 2,000 | 2,000 | 2,000 | 2,000 | 1,801 | 1,572 | 1,318 | 1,067 |
| uniform | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 1,708 | |
| HSS 4" x 2" x 3/16" | concentrated | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 1,820 | 1,474 |
| uniform | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | 2,000 | |
Table Notes a-h
- Allowable concentrated load at middle of span. Allowable loads are net (weight of tube has been accounted for).
- Multiple loads, that are symmetrically placed and whose total equals the tabulated value, may be used.
- The reaction to each clamp bracket must be limited to a net value of the clamp’s charted capacity.
- Allowable loads have been limited to 2,000 lbs maximum.
- Allowable loads are based on 46 ksi minimum yield steel (A500, Gr. B), the AISC specification and a safety factor of 2.0.
- Loads in bold (1,067) are governed by applied-load deflection limit of Span / 240; (e.g., 0.50" for 10′ span).
- Tube’s 4" dimension is vertical. Span is horizontal.
- Tube weights: 4.75 lbs/ft for 1/8" wall, and 6.87 lbs/ft for 3/16" wall. Weights and thicknesses are nominal.
Tube Framing Clamp System
Live Load Capacity (pounds)
| Component Capacities | Download Positive | Uplift Negative |
| Allowable Load (pounds) | ||
| Joist Grip End Clamp | 1,000 | 1,000 |
| T-Bracket | 1,000 | 1,000 |
| InLine End Clamp | 1,000 | 1,000 |
| Girder Clamp | 1,000 | – |
| Cross Support Bracket | 1,000 | – |