Live Load Reduction for Foundations or Footings
Live Load Reduction for Foundations or Footings
(OP)
Here's an easy one for ya'll:
What KLL do you use for foundation design? I was looking for a code reference or commentary mentioning footings, but to no avail. Strictly by code -- I'd guess it falls to "All other members not identified" KLL = 1. Thanks in advance for your input.
What KLL do you use for foundation design? I was looking for a code reference or commentary mentioning footings, but to no avail. Strictly by code -- I'd guess it falls to "All other members not identified" KLL = 1. Thanks in advance for your input.






RE: Live Load Reduction for Foundations or Footings
Good Luck!
RE: Live Load Reduction for Foundations or Footings
RE: Live Load Reduction for Foundations or Footings
RE: Live Load Reduction for Foundations or Footings
Looking at the numbers, for live load only, for a one foot strip, say 25 foot bay, it would take up to the seventh floor to overcome the 400 square foot break point in ASCE7-10, section 4.7.2, no reduction could be taken until you reached the seventeenth floor... (400 / 25 = 16).
Hence, the tendency to ignore LLR for strip footings.
Mike McCann
MMC Engineering
RE: Live Load Reduction for Foundations or Footings
RE: Live Load Reduction for Foundations or Footings
RE: Live Load Reduction for Foundations or Footings
Mike McCann
MMC Engineering
RE: Live Load Reduction for Foundations or Footings
I see what you are saying. I still feel that LLR should be able to be used for a strip footing as the wall will redistribute the loaded area to a neighbouring unloaded area and as such looking at only a 1 ft width of footing seems way too conservative.
RE: Live Load Reduction for Foundations or Footings
The footing just needs to carry the same load as the wall or column which sits on it.