How long can threaded rod be?

Load capacities of threaded hanger rods are indicated below:

Threaded Rods - Maximum Loads - Imperial Units Nominal Rod Diameter
(in)Root Area of Thread
(in2)
Maximum Load 1) lbkg 3/8 0.07 600 270 1/2 0.13 1100 500 5/8 0.20 1800 820 3/4 0.30 2700 1220 7/8 0.42 3800 1720 1 0.55 4900 2220 1 1/8 0.69 6200 2810 1 1/4 0.89 8000 3630 1 1/2 1.29 11600 5260 1 3/4 1.74 14700 6670 2 2.30 20700 9390 2 1/4 3.02 27200 12340 2 1/2 3.72 33500 15200 3 5.62 50600 22960 3 1/4 6.72 60500 27440 3 1/2 7.92 71300 32340 4 10.6 95400 43270 4 1/2 13.7 123000 55780 5 17.2 154000 69900

1) The maximum loads in the table above are based on allowable tensile stress of 12 kpsi - reduced by 25% to 9 kpsi allowable stress.

Note that hangers supporting steam, water, air or gas piping systems should be able to carry the weight of piping, insulation, valves and other equipment - and water for hydrostatic pressure testing - without exceeding 80% of the supporting hangers yield strength (not exceeding 16 kpsi for steel of unknown properties)

Recommended Rod Sizes

Recommended rod sizes for individual pipes:

Recommended Rod Sizes Pipe Size
(in)Rod Size
(in) < 2 3/8 2 1/2 - 3 1/2 1/2 4 - 5 5/8 6 3/4 8 - 12 7/8 14 - 16 1 18 1 1/8 20 1 1/4 24 1 1/2

Rod diameter less than 3⁄8 in (12 mm) is not recommended as support.

• Threaded all the way down
• Chamfered at each end
• Used with channel or strut assemblies for:
• Sprinkler systems
• Wiring
• Air conditioning ducts
• Piping
• Corrosion and rust resistant
• Suitable for long lasting applications
• Also known as threaded stud or all thread

Stainless Steel Threaded Rod in 6-foot lengths is used to stabilize or hang structures often with the use of anchors. Threaded Rod in this selection is UNC Coarse threaded in 6-foot segments.

Due to the extended dimensions of the required shipping containers, threaded rod is not eligible for Free or Express Shipping.

For more information on Threaded Rod Shipping Fees, please visit our Shipping Information page.