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Recent content by waytsh

  1. waytsh

    Second Layer Reroof Less than 3 psf Procedure

    I have a client that would like to perform a metal over metal reroof on an existing commercial steel building. The second layer of roof is less than 3 psf. IEBC grants an exception when the second layer of reroof is less than 3 psf, but what exactly does this mean? Does this mean that they...
  2. waytsh

    IEBC Allowable 5% Gravity Increase on Total Load or Load Type?

    Thank you all for the responses. Sorry for the delay in posting again. Sometimes life gets in the way. Correct, in my particular situation the client is adding a roof top unit but I think the Prescriptive and Alteration Level 1 chapters have the same wording. I think I am landing with the...
  3. waytsh

    IEBC Allowable 5% Gravity Increase on Total Load or Load Type?

    My understanding based on previous editions of the IEBC is that the 5% increase was based on the total gravity load. The wording in the more current versions, however, could be read as 5% of the load type, i.e. dead, live, or snow. “Any existing gravity load-carrying structural element for...
  4. waytsh

    Long A325 Bolt Alternatives

    Fair point, I will double check my numbers. They are in white oak with a very large edge distance.
  5. waytsh

    Long A325 Bolt Alternatives

    I might be able to squeak by with A307s in some areas. If I can't I can look at increasing the number of bolts.
  6. waytsh

    Long A325 Bolt Alternatives

    Hi All, I have designed a reinforcing solution for a barn timber using bolted steel side plates. The contractor is having trouble sourcing the long A325 bolts required. I can't really use lags bolts, at least on the backside of the timber because of clearance with the roof. Is there a good...
  7. waytsh

    Timber Purlin - Biaxial Bending?

    I laid out the FBD's last night and I agree with ANE91. I think another critical component to all of this is that the rafters are positively connected to the purlins.
  8. waytsh

    Timber Purlin - Biaxial Bending?

    I guess I better bite the bullet and design this reinforcing for biaxial bending. If any of you all have a good suggestion for how to do this I am all ears. My thought is stack a wood beam of the same width below the purlin to allow room for taller side plates. I will design the side plates...
  9. waytsh

    Timber Purlin - Biaxial Bending?

    No ridge beam but the building a asymmetrical so there is a purlin on the opposite slope only about 5' down from the ridge. The slope that this purlin is on has two rows of purlins of which this is one. All purlins are oriented in this manner. Correct, and the slope is 8:12. So would you be...
  10. waytsh

    Timber Purlin - Biaxial Bending?

    I don't necessarily disagree, but that does not seem to be the way the Timber Manual is considering load application to a purlin. Maybe I am missing something.
  11. waytsh

    Timber Purlin - Biaxial Bending?

    Hi All, Quick sanity check question on a timber purlin I am reviewing in an old barn. The purlin is not rotated with the roof as is typical but is vertically oriented relative to the ground. The top has pockets cut into it with the slope of the roof so the rafters can run over top of it...
  12. waytsh

    Glitches in Flitch Beam Design

    Hi All, I am investigating the possibility of reinforcing a failing timber purlin in a barn with side plates. Some old posts mention that the document "Glitches in Flitch Beam Design" might be helpful for this analysis. Before I try to order this thing through Linda Hall I wanted to check to...
  13. waytsh

    Treehouse Design (literally a small house in the trees)

    Looks like it would involve determining the climatic loading and sizing rafters, joists, carry beams, etc. I did run this by my insurer and as expected they were less than thrilled. Sounds like I may need to decline on that basis alone. It is a shame, would be fun to work on something a...
  14. waytsh

    Treehouse Design (literally a small house in the trees)

    Hi All, Just got a request from a client to provide some engineering on a treehouse from a treehouse company here in the States. Curious if any of you have ever worked on anything like this. Seems like a lot of risk for very little $. Obvious concerns are the fact that it is going to be...
  15. waytsh

    SJI Steel Joist Top Chord Analysis

    Alright, you convinced me. [smile] I am going to roll with my model. Thanks!
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