Live Load vs Roof Live Load
Live Load vs Roof Live Load
(OP)
Hi all,
As per ASCE 7, Chapter 4, there are two definitions of live load, 1. Live Load 2. Roof Live Load.
Regarding to the definitions according to ASCE, can anyone tell me what is the difference between them? How we choose to apply them in calculation? Is there any specific factor needs to be added, when we apply those loads?
Please help! Thanks!!
As per ASCE 7, Chapter 4, there are two definitions of live load, 1. Live Load 2. Roof Live Load.
Regarding to the definitions according to ASCE, can anyone tell me what is the difference between them? How we choose to apply them in calculation? Is there any specific factor needs to be added, when we apply those loads?
Please help! Thanks!!






RE: Live Load vs Roof Live Load
I think I've seen some other posts on putting solar panels on existing roofs, etc., and more information may get a better response in a case like that.
RE: Live Load vs Roof Live Load
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: Live Load vs Roof Live Load
In warmer climates where snow doesn't occur, or is of low intensity, the roof live load provides a level of competency in a roof that would typically be loaded only by maintenance workers, equipment and other materials through its life. This is suggested in the ASCE 7-10 section C4.3.3.
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RE: Live Load vs Roof Live Load
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: Live Load vs Roof Live Load
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RE: Live Load vs Roof Live Load
Taking the roof dance floor example. I would think it probably a good idea to include it as a regular live load for earthquake combos since roof live loads aren't even included. Don't know that taking the full 1.0L during the wind event is necessary though. Wouldn't imagine you'd have a roof dance party during a 700 year storm. Same goes for the snow combinations.
RE: Live Load vs Roof Live Load
In the dance floor example I'd probably use (LRFD) 1.2D + 1.0W + 1.0L + 0.5L(roof dance) for the wind combo, (LRFD) 1.2D + 1.6(S or R) + (1.0L or 0.5W) (no roof dance live), and (LRFD) 1.2D + 1.0E + 1.0L + 1.0L(roof dance). Seems to meet the intent of the load combos and is rational for typical real world loading situations.
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries
https://www.facebook.com/AmericanConcrete/
RE: Live Load vs Roof Live Load
RE: Live Load vs Roof Live Load
RE: Live Load vs Roof Live Load