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RE: WOOD MOMENT FRAMES[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaoc(--nospam--at)seaoc.org>
- Subject: RE: WOOD MOMENT FRAMES
- From: "Dennis S. Wish" <wish(--nospam--at)cwia.com>
- Date: Fri, 10 Apr 1998 13:50:10 -0700
I agree with the information you received from Charles Greenslaw - you really can not create the rigidity and stiffness you need at the connection of wood to wood. The closes you can come is to create two flag pole conditions by embedding the wood into a post hole foundation (similar to a fence post design) however, be cautious since even redwood will begin to rot out after sufficient time. The first consideration is that the seismic zone makes very little difference here since wind will most likely govern. You still need to distribute wind loads proportionately. Depending upon the magnitude of your reaction at each post, and the diameter or depth of the steel column (assuming a Pipe - standard, extra strong or double extra strong - or TS tube steel section) you can use either a grade beam or embedded post foundation. If the steel section is small enough, I would suggest cladding wood veneer with stud pins to the outside face of steel and essentially creating what appears to be a wood column. This will give you a connection that should last the test of time and provide sufficient restraint for your wind loads. Regards Dennis S. Wish PE La Quinta, California wish(--nospam--at)cwia.com ICQ# 6110557 http://wwp.mirabilis.com/6110557 "The death of democracy is not likely to be an assassination from ambush. It will be a slow extinction from apathy, indifference, and undernourishment." Robert Hutchins -----Original Message----- From: RDAHLMANN [mailto:RDAHLMANN(--nospam--at)aol.com] Sent: Thursday, April 09, 1998 9:04 PM To: seaoc(--nospam--at)seaoc.org Subject: WOOD MOMENT FRAMES I HAVE A CLIENT WHO WANTS TO USE A WOOD BEAM IN CONJUNCTION WITH STEEL COLUMNS TO CREATE A MOMENT FRAME. THIS IS RESIDENTIAL CONSTRUCTION IS SEISMIC ZONE 2. I AM VERY HESITANT DUE TO: 1. THE ENORMOUS AMOUNT OF BOLTS REQUIRED AT EACH END 2. THE IMPRACTICALITY OF EXPECTING RESIDENTIAL CARPENTERS TO GET THE BOLT HOLES EXACTLY RIGHT (SINCE THE BOLT HOLE WILL NEED TO BE SNUG WITH THE BOLTS IN ORDER TO MAINTAIN A RIGID CONNECTION) 3. THE POSSIBLE FUTURE ELONGATION OF THE BOLT HOLES DUE TO CONTINUES MOTION OVER THE YEARS. IF ANYONE HAS ANY SUGGESTIONS, THEY WOULD BE GREATLY APPRECIATED. RICHARD DAHLMANN, P.E.
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- From: RDAHLMANN
- WOOD MOMENT FRAMES
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