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RE: Infilling Openings in Existing Masonry Walls
- To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
- Subject: RE: Infilling Openings in Existing Masonry Walls
- From: Steve Widmayer <SWidmayer(--nospam--at)WILLDAN.com>
- Date: Fri, 12 Sep 2003 16:03:57 -0700
would be the last sentence of UBC/CBC Sec. 1605.2.1. It became part of the
Code for exactly the reason you give and the evidence from damaged buildings
with "in-fill walls".
infilling a wall and grouting it solid you are changing the stiffness of the
vertical resisting element......if diaphragms are rigid, this may change
center of ridigity, center of mass & the stress / load distribution
throughout......most people then to think I'm adding more stiffness /
mass....good thing....well maybe not.....if the building's not properly
detailed / designed for the changed load distribution....it almost
starts a total "building analysis" ..........you know what your working
with...so maybe it's not an issue.....
Could always dowel in / leave expansion joint material to try and
isolate the stiffness...
Robert C. Rogers,
I am currently working on a
remodel project which requires closing some existing openings in a masonry
wall. Of course, I want to do this with studs and
gyp. Board, but the architect wants to do this in CMU. Call me crazy, but I
want to drill and grout dowels around the perimeter of the existing opening
in order to transfer shear forces from the infill to the existing. However,
once I do, I can’t get in all of the blocks to close the
How does everyone else solve
this problem? This can’t be the first time an architect wanted to close an
existing opening with CMU. Is it?
T. William (Bill) Allen, S.E.