Stirrup spacing check
Stirrup spacing check
(OP)
There are two code requirements that I look at when spacing my stirrups and these are:
s =< 48db, column width, (and one more that I can't remember!)
AND
Maximum spacing: s =< min(600mm, 0.7dv)
What is the difference between both of these checks and why was I told that the second check should not be performed when spacing stirrups in columns? The clause does not mention that the latter check is for beams only, which is why I was left confused when I was told to ignore it when designing stirrups in columns.
Of course, upon asking the question to my supervisor, he responded "I don't have time to explain, just do it." Heh.
s =< 48db, column width, (and one more that I can't remember!)
AND
Maximum spacing: s =< min(600mm, 0.7dv)
What is the difference between both of these checks and why was I told that the second check should not be performed when spacing stirrups in columns? The clause does not mention that the latter check is for beams only, which is why I was left confused when I was told to ignore it when designing stirrups in columns.
Of course, upon asking the question to my supervisor, he responded "I don't have time to explain, just do it." Heh.
Clansman






RE: Stirrup spacing check
Clansman
RE: Stirrup spacing check
If you are talking about stirrups in a beam, they have to be spaced closer to avoid a shear failure resulting from a crack falling between the stirrups.
Best regards,
BA
RE: Stirrup spacing check
The limit of d/2 is secified because length of shear crack is about 'd' in beams.
Shear is not critical in columns beacuse shear strength of members increases considerably in presence of axial comressive force.
RE: Stirrup spacing check
Horizontal reinforcement in a wall is heavier than vertical reinforcement, because a wall is much longer parallel to the horizontal bars. The bars are for crack control.
DaveAtkins