I-Beam Cantilever Rack - 144"H x 72"W, Double Sided Starter, 12 Arms

1. Determine the number and spacing of support arms using enough arms to prevent deflection of the load:

1. Number of arms required = number of wood blocks needed to support load without deflection. Test for deflection:
• Place wood blocks evenly spaced on the floor under the load, starting with 2 wood blocks
• Add blocks at evenly spaced intervals under the load, until the load no longer deflects (or sags between wood blocks)
2. Arm capacity required = Load weight / number of wood blocks needed (2 blocks mean arm capacity required is 1/2 the load weight, 3 blocks equal 1/3 the load weight, etc.)
3. Optimal width between uprights = load length / by the number of block supports needed (2 blocks means the centerpoint between uprights is 1/2 the load length, 3 blocks mean the uprights must be positioned at intervals equal to 1/3 of the load length, etc.)
• Correct design has product overhang at the end of the rack by 1/2 of the optimal upright width distance

2. Determine the arm length, which is:

1. equal to the load depth
2. and load does not hang over the end of the arm

3. Determine the optimal upright height beginning with the base height:

• Base Height
• + number of storage levels x load height
• + number of arm levels x arm height at widest point
• + number of storage levels x handling clearance (4" - 6")
• = upright height
• Be mindful your total height is within ceiling height and forklift height limits
• Your topmost arm level must be below the upright height top
• Contact us for current arm and base dimensions

4. Determine capacities needed:

1. Arm capacity = Load weight / number of arms per level (assuming load is to be evenly distributed)
2. Upright capacity = Number of arms per side x load per arm
• Load on base is not included in capacity

5. Brace lengths equal the horizontal distance on center between uprights