IBC Code
IBC Code
(OP)
According to IBC Code,
if i am designing a stair case
It say's For Top rails use 200# or 50 #/ft which ever is max.
Does 50#/ft loading has to be continuous...
Or do i have to find out the max moment or reaction it will prroduce considering various cases
such as for 3 span:
case 1 : 50# /ft Through out
case2 : 50#/ ft at end
case 3: 50 #/ ft across 2 contionous spans..
if i am designing a stair case
It say's For Top rails use 200# or 50 #/ft which ever is max.
Does 50#/ft loading has to be continuous...
Or do i have to find out the max moment or reaction it will prroduce considering various cases
such as for 3 span:
case 1 : 50# /ft Through out
case2 : 50#/ ft at end
case 3: 50 #/ ft across 2 contionous spans..






RE: IBC Code
RE: IBC Code
in 3 span: continous on first two spans , and no load on the third.
If you see the guard rail is loaded continuous on first two spans.
If we can load the concentrated 200# at center, ends (for cantilever condition), why not the uniform loading.
If you see the ASD/ LRFD manual page 2-309 for 4 span loading,if we compare fig 39 to fig 37
we can see that fig 37 has a moment that is 200% more than fig 39. If my section can bear bending stress (with 1.33 overstress included) for fig 39 will it not fail in fig 37 case loading..
RE: IBC Code
However, a 50 plf over the entire length will control for other cases compared to a 200# load. I have heard reasons that the 200 # load could be from a person falling over who is trying to hold on from falling over. The 50 plf is more for people exiting during a emergency or some such event.
It is also interesting to note that you are allowed a 1/3 increase in stresses in the Florida Building Code, however in a HVHZ (high velocity hurricane zone), no stress increase is allowed. To me a enclosed stair is independent of whether it is in the middle of a storm or in vaccum.
Your thoughts are welcome.
RE: IBC Code
RE: IBC Code
Slickdeals, JaE, Stevemort and other..
RE: IBC Code