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You may need a bigger beam to control drift.


From: Paul Feather [mailto:pfeather(--nospam--at)]
Sent: Tuesday, September 27, 2005 11:56 AM
To: seaint(--nospam--at)
Subject: Re: SMRSF




Why the W6x9 in the first place?


The W6 is contributing next to nothing to the frame, you could probably eliminate it and not have any substantial change in frame behavior.  I would match the depth of the opposite side for continuity plate connections if nothing else, and if you are trying to have a three bay frame, then you need something that will actually be a three bay frame.



----- Original Message -----

Sent: Tuesday, September 27, 2005 12:14 PM

Subject: SMRSF


Hello all:


This is my time where I have had this situation.  I have a 2 story frame with 3 bays.  # bays are needed to keep p less than 1.25.  These are the beams from analysis:


The roof beams are .76-.78 of allowable

The floor beams are .60-.82 of allowable

The floor beams are .74-.84 of allowable


 20'                        28'                    6'


W12x40                W12x53            W12x16        Roof



W14x48                W14x61           W6x9          2nd Floor


All columns W18x60



I would usually think to use a W14x22 at the floor not a W6x9


I would like to here others thoughts. 




Joe Venuti
Johnson & Nielsen Associates
Palm Springs, CA