HSS vs. W-Flange and Angle Costs
HSS vs. W-Flange and Angle Costs
(OP)
I'm currently providing some design alternates for a steel frame sign structure. The original design incorporated HSS columns and HSS secondary frame members. Our proposed alternate is using W-flange columns and angle secondary framing.
Based on a weight comparison, the W-flange/angle frame is lighter. However, I have heard before that the cost difference per pound between HSS and W-flange/angle is not 1:1, but HSS is typically more expensive per pound. Does anyone have a feel for what the cost difference may actually be?
Based on a weight comparison, the W-flange/angle frame is lighter. However, I have heard before that the cost difference per pound between HSS and W-flange/angle is not 1:1, but HSS is typically more expensive per pound. Does anyone have a feel for what the cost difference may actually be?
Nick Deal, P.E.
Michael Brady Inc.
http://www.michaelbradyinc.com






RE: HSS vs. W-Flange and Angle Costs
RE: HSS vs. W-Flange and Angle Costs
For a 'ballpark' estimate, I use 1.25 to 1.33. I'm guessing this is a number that has a high degree of local variability.
RE: HSS vs. W-Flange and Angle Costs
RE: HSS vs. W-Flange and Angle Costs
A simple superstructure without truss framing makes for quicker work on the sign as well. It might be cheaper to build with angle trusses, but if your service men spend twice as much time on the sign climbing like monkeys, all potential gain will be lost in a matter of a few years in service.
RE: HSS vs. W-Flange and Angle Costs
Fewer heavier members will also improve fabrication and erection costs - fewer pieces to fab, ship, lift and erect.
Lowest weight is not always lowest cost.