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RE: CMU DESIGN LIST

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Francisco,

I don't have a list, but the most often overlooked items I have observed are
details and out of plane loads at openings.  And that is where you see the
problems in the field.

In concept it is just like floor framing, and following the load path.  What
gets you in out of plane loads is that the masonry elements on each side of
a door or window jamb have a reduced flange width (using the T beam
analogy).

Also watch uplift.  You generally need a 2 course bond beam at the top of a
wall to develop the transfer of the purlin connectors to the vertical wall
rebar.  You generally can't develop the vertical rebar even if it is hooked
in a single course bond beam.

Another often overlooked detail is the "continuous" chord in the diaphragm.

I would advise paying close attention to the details and getting a peer
review.

Regards,
Harold Sprague
The Neenan Company


-----Original Message-----
From: Francisco Duarte [mailto:fduarte(--nospam--at)leasung.com]
Sent: Saturday, April 21, 2001 3:31 PM
To: seaint(--nospam--at)seaint.org
Subject: CMU DESIGN LIST


Hello everyone,

I have never design a Masonry Building, but I have take a Masonry Class
a while back.  Now I have been given  CMU addition to an existing one
story CMU building. This is my first ever Masonry design. I started the
design and this is what I got so far:
1-Roof
    rafters
    Purlins

2-CMU
    lintel worth case for garvity and wind load
    8" wall design for gravity load and vertical load
3-footing
    chk bearing and steel requirement

4- Lateral Analysis
    forces
    chk pier for O.T. (column design method)

I guess my question is whether I am forgetting something else to check.
Does anyone have a list of things to check for in the design of CMU
BUILDING?
Or some source of sample calculations of a CMU BUILDING?

THANKS IN ADVANCE

FRANCISCO DUARTE

p.s.
In terms of the working drawings, well I guess that is a question for
tomorrow.