Vertical Distribution
Vertical Distribution
(OP)
I am working on a structure that has a landing/second floor at 14'-6" above finish floor and a roof at 26'-0'. The landing/second floor is on one corner only, it is not the full width and length of the roof plan area. Also, the floor/landing is being supported by hangers from two sides and connected two the walls on the other two sides. Laterally the floor/landing has a shearwall on one side supported from the roof and it is connected to a full ht shearwall on the other side. Is a vertical distribution of seismic forces required?






RE: Vertical Distribution
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Vertical Distribution
RE: Vertical Distribution
For your seismic load distribution, seems like a 'mezzanine' or 'catwalk' system should be treated as a 'Non-structural' component and not considered a floor. This would change how the seismic loads are distributed.
I am not in a high seismic region, so just my 2-cents
RE: Vertical Distribution
If it is a catwalk, yes, but the weight still has to be added for the seismic.
If it is a mezzanine that is self supported laterally, totally separate from the rest of the structure, then yes again - no redistribution needed.
However, that does not appear to be the case here as the mezzanine is attached to the structure, and has shear walls only on two sides. Here I would redistribute.
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Vertical Distribution
BA
RE: Vertical Distribution
RE: Vertical Distribution