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  1. oldrunner

    Looking for stud wall bearing capacity tables

    You probably can't use a 6" depth for a 20 foot stud if you have significant wind with stucco or drywall. Also will you be spanning your roof trusses clear across the building?
  2. oldrunner

    Shear Wall Hold Down Distance Apart

    How sad that there is no oversight of the engineering in this state. Is this why we see so many buildings trashed in the big winds? My view in the big scale of all things in nature is that wood buildings are assemblies of sticks, pins and paper like panels. By the way, the modulus of...
  3. oldrunner

    Shear Wall Hold Down Distance Apart

    Curlyque: Your certainly have a unique problem on your hands. From your descriptions and arguments, it appears that you may have not taken a timber design course when you went to college. I would suggest that you obtain almost any edition of the Design of Wood Structures by Breyer and review...
  4. oldrunner

    Shear Wall Hold Down Distance Apart

    jdgengineer: You are right about typical shear wall construction, but CurlyQue answered the question which hadn't been asked. Basically each four foot panel is a shear wall section in itself - only connected together with top and bottom plates which distribute the lateral loads to each wall...
  5. oldrunner

    Shear Wall Hold Down Distance Apart

    I haven't read all of the posts above but do have one question. Is each 4' panel section(either sheathed with sheet rock or OSB) stacked next to each other, but the sheathing does not overlap from panel to panel? What I'm trying to determine is whether you have a line of individual panel...
  6. oldrunner

    60' wood bowstring truss broken bottom chord

    One of your problems, if you so choose to add some sort of ties each side of the existing bottom flange, will be connecting to the ends of the existing truss to resist and be equal to the compressive from the top chords. The truss should now be shored before you begin any work on it. A...
  7. oldrunner

    Wooden rectangular tank design

    The NDS is the National Design Specification for Wood Construction and yes, it is a US code. The code is fairly straight forward except for terminology which you would have to learn. My timber text book is "Design of Wood Structures" by Breyer, 6th edition. Older editions would probably...
  8. oldrunner

    Wooden rectangular tank design

    Hire a structural engineer who has experience in timber design. Just plugging numbers into formulas that you might not understand might not work. Your biggest problem is going to be connections. Other problems may be moisture content in the wood, type of plywood (I assume) wall covering and...
  9. oldrunner

    Residential Foundations

    Make sure that there is no clay in the soil.
  10. oldrunner

    Help Converting Static Bending Properties to Fb ?

    Refer to Table 4A of the current NDS Design Values for Wood Construction. There are a number of types of Oak. You might compare the weakest #2 Oak and see if that is adequate. Crawler cranes spread their loads out while wheel loads have limited spread in comparison. You should be able to...
  11. oldrunner

    cart on plywood

    You can design the plywood for the bending forces by considering only outer plys. The section properties for the various grades and thicknesses are in one of the APA publications. You will have to determine how the panel is loaded with the four wheels of the cart. Also the cart wheels may not...
  12. oldrunner

    Help Converting Static Bending Properties to Fb ?

    You should also include an impact factor for the truck loads. Load spreading of the tires can be found in AASHTO's code for bridges considering the mats as laminate members. You can obtain the impact factor from AASHTO also. If this becomes a problem, you can set a speed limit on the bridge...
  13. oldrunner

    Peaking of Parallam...

    Just google parallam and/or trussjoist and you'll get all kinds of hits. Parallam has been around quite a while now.
  14. oldrunner

    Wood shear wall design

    You might also obtain Volumes I and II, "Seismic Design", published by ICBO and written by SEAOC. There's good examples there. If you haven't taken timber design in school, Breyer's "Design of Wood Structures" is excellent.
  15. oldrunner

    2003 IRC / WFCM

    This is from Norbord's website: "When nailed according to an engineer-specified nailing pattern Windstorm can reduce or eliminate wall uplift hardware" Check this site: www.windstormosb.com/ws-method-high.html According to Norbord's web-site in comparing their 2-Step Windstorm Method to...
  16. oldrunner

    2003 IRC / WFCM

    boo1: The referenced report is interesting. The testing comany has tested the cross-grain failure mechanism as well as the nail failure. The report shows the cross grain failures on pages 16 and 17. Although cross-grain values are not provided by NDS, values of 300 to 400 psi are referenced...
  17. oldrunner

    Old Wood Truss Failure

    Within the last day, there was a bowstring truss failure in Sacramento, California. For more information, check the Sacramento Bee: http://www.sacbee.com/ These kind of failures tend to have a ripple effect with one truss failing and then pulling down the adjacent trusses and so on. About 10...

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