Mike
My wife is from Montana, and we recently flew into the Bozeman / Belgrade airport for a family visit. There was a big glossy display for log homes .... constructed from precast concrete "logs." Given the fire situation, it would be a great product here .... and eliminate shrinkage...
Mike
I would agree ... installation problems are most of the problems in hold downs of all types. But in this case, there is absolutely no other credible explanation. All (of about 12) buckles are in known locations of hold down straps. (No other buckles at all) I cannot believe that 6%...
My shrinkage, as noted above, is from __one floor__ at a time. Not accumulated. But the multi-story aspect is significant insofar as the hold-downs have to resist a lot of load, and they will have to start with 1/4" slack, and then with nail slip they will exceed about 3/8" or so. That is too...
For those of you wondering about the need for shrinkage compensation devices or careful control of wood moisture content with wood shear walls, consider my recent experience with a multi-story wood building in the Seattle area. The siding on the building had buckled as much as 1 3/8" --- always...
First, sorry about the delay. I got sidetracked, then the holidays, and also ill. Sheesh ...
We hope to give the header a 30 year life with minimal maintenance, which is to say, a thorough maintenance after 12 - 15 years.
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I have to find a coating for a rebuild of a "Tow Bro" header that is to be immersed in a secondary wastewater treatment plant. The existing one was originally galvanized, and is now pretty much completely corroded (1/4" steel rusted through in several locations). I found a...
A basement is just a small sized example of a "concrete tank". PCA (Portland Cement Association) has a complete guide, including moment coefficients, called Rectangular Concrete Tanks. It is appropriate for sanitary structures, i.e. water and wastewater -- with extra factors to limit cracking...
I have a detail for a steel header for making a cut in some unreinforced brick masonry. I have had some experience in making cuts in URM (even in stone masonry) but they included a lot of work with the contractor on how to reinforce the wall step-at-a-time. In this case, I am not working for...
You can find some references from FEMA -- given what happened at the Murrah building in Oklahoma City.
Also, "Introduction to Structural Dynamics," by John M. Biggs (MCGraw Hill 1964) has a section on blast effects. Biggs cut his teeth doing DOD work on nuclear explosion effects ...
but this...
