The Unistrut P3301 is a back-to-back channel with dimensions of 1-5/8″ x 1-3/4″ and a 12 ga (.105″) wall. It shorter than both the P1001 and P3001.
| Elements of Section – P3301 | ||
| Area of Section | 0.790 in2 (5.1 cm2) | |
| Axis 1-1 | Axis 2-2 | |
| Moment of Inertia (I) | 0.176 in4 (7.3 cm4) | 0.285 in4 (11.9 cm4) |
| Section Modulus (S) | 0.201 in3 (3.3 cm3) | 0.351 in3 (5.8 cm3) |
| Radius of Gyration (r) | 0.472 in(1.2 cm) | 0.601 in(1.5 cm) |
| Column Loading – P3301 Unbraced Height (in) Allowable Load at Slot Face (lbs) Max Column Load Applied at C.G. K=0.65 (lbs) K=0.80 (lbs) K=1.0 (lbs) K=1.2 (lbs) 24 4,290 16,990 16,580 15,770 14,720 36 4,150 15,890 14,720 12,980 11,120 48 3,940 14,160 12,360 9,880 7,510 60 3,650 12,210 9,880 6,940 4,820 72 3,270 10,190 7,510 4,820 3,350 84 2,800 8,220 5,530 3,540 * 96 2,410 6,420 4,240 * * 108 2,080 5,070 3,350 * * *KL/r > 200 |
| Beam Loading – P3301 | ||||||
| Span (in) | Max Allowable Uniform Load (lbs) | Defl at Uniform load (in) | Uniform Loading at Deflection | Lateral Bracing Reduction Factor | ||
| Span /180 (lbs) | Span /240 (lbs) | Span /360 (lbs) | ||||
| 24 | 1,690 | 0.06 | 1,690 | 1,690 | 1,690 | 1.00 |
| 36 | 1,130 | 0.13 | 1,130 | 1,130 | 860 | 1.00 |
| 48 | 840 | 0.23 | 840 | 720 | 480 | 1.00 |
| 60 | 680 | 0.37 | 620 | 460 | 310 | 1.00 |
| 72 | 560 | 0.52 | 430 | 320 | 210 | 0.97 |
| 84 | 480 | 0.71 | 310 | 240 | 160 | 0.95 |
| 96 | 420 | 0.93 | 240 | 180 | 120 | 0.92 |
| 108 | 380 | 1.20 | 190 | 140 | 100 | 0.90 |
| 120 | 340 | 1.47 | 150 | 120 | 80 | 0.87 |
| 144 | 280 | 2.09 | 110 | 80 | 50 | 0.82 |
Notes:
- Above loads include the weight of the member. This weight must be deducted to arrive at the net allowable load the beam will support.
- Long span beams should be supported so as to prevent rotation and twist.
- Allowable uniformly distributed loads are listed for various simple spans, that is, a beam on two supports. If load is concentrated at the center of the span, multiply load from the table by 0.5 and corresponding deflection by 0.8.
- The lateral bracing factor should be multiplied by the load to determine the load retained based on the distance between lateral braces.
