Load capacities of threaded hanger rods are indicated in the table below:Nominal Rod Diameter(inches)Root Area of Thread(in2)Maximum Load 1)

(lbs)(kg)

3/80.07600270

1/20.131100500

5/80.201800820

3/40.3027001220

7/80.4238001720

10.5549002220

1 1/80.6962002810

1 1/40.8980003630

1 1/21.29116005260

1 3/41.74147006670

22.30207009390

2 1/43.022720012340

2 1/23.723350015200

35.625060022960

3 1/46.726050027440

3 1/27.927130032340

410.69540043270

4 1/213.712300055780

517.215400069900

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)