Live Load of 30 Workers?
Live Load of 30 Workers?
(OP)
i need to design some brackets to support a truss and 30 boilermakers while replacing the boiler wall that supports the truss in normal service. They have installed scaffolding on top of the truss, and the superintendent will have no more than 30 people working from the scaffolding at one time.
How do i determine the live load to include for 30 people?
How do i determine the live load to include for 30 people?






RE: Live Load of 30 Workers?
Alternately, you could get the area of the scaffold and multiply by 100 psf.
RE: Live Load of 30 Workers?
RE: Live Load of 30 Workers?
i just wasn't sure if typically a factor would be included to accomodate more than the static weight of the people occupying the surface.
RE: Live Load of 30 Workers?
Simply multiplying the scaffold area by 100 psf and then taking the number of levels into account was much larger than 20 or so workers the scaffold would be subject too (I normally assume 300 lbs per worker to account for tools, misc equipment, etc).
Hope it helps,
JWB
RE: Live Load of 30 Workers?
I examine the CTE code (Spain's) and there's no explicit live load allocation for this situation. ASCE 7-05 you choose in table 4.1 and
"4.7 IMPACT LOADS
The live loads specified in Sections 4.2.1 and 4.4.2 shall be assumed to include adequate allowance for ordinary impact conditions."
I have also practiced the worker loads at the lower ranges quoted in my previous post in HVAC equipment context on laminated wood flooring. Even then we didn't just use the purportedly actual weight of the workers but I think to remember 200 kgf/m2.
RE: Live Load of 30 Workers?
However, the CG of a boilermaker is relatively low, so I would ignore any impact. I would include a 1.25 sloshing coefficient though.
Mike McCann
MMC Engineering
RE: Live Load of 30 Workers?