CMU Wall Max. Length
CMU Wall Max. Length
(OP)
I am designing stair tower made of 12" thk CMU. It is a free standing vertical box 23'x9'x45' with 4 walls (please see attachment). Tower is located inside of existing warehouse in California. I am planning to have bond beams at every stair landing. Section 2109.4.1 of CBC or IBC says: "Masonry walls shall be laterally supported in either the horizontal or vertical direction at intervals not exceeding those given in Table 2109.4.1."
Question is what is max. length or height for this tower? Is it distance between bond beams or full height? Also what type of construction these walls are-bearing or non-bearing walls?
Thank you very much,
IV
Question is what is max. length or height for this tower? Is it distance between bond beams or full height? Also what type of construction these walls are-bearing or non-bearing walls?
Thank you very much,
IV






RE: CMU Wall Max. Length
RE: CMU Wall Max. Length
A. If there are floor or roof diaphragms that tie into the wall, lateral support points can be assumed here with proper connections.
B. If not, then you will have to look at the stair landing configuration to see if some logical argument can be made for restraint there.
If not, then full height, but I do not think that this will have to be the case. There could also be a combination of A and B considering the fact that there are four walls, probably with different lateral support situations.
Mike McCann
MMC Engineering
RE: CMU Wall Max. Length
I know this doesn't answer your question but it is another option.
RE: CMU Wall Max. Length
RE: CMU Wall Max. Length