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  1. D

    Trying to find someone to tell you what you want to hear

    what's the torque required on the various side bolts ;) Depends, do I get to hold his beer? A doubled up 2x4 edgewise with 2 guys on each side of the car is insufficient to pull an engine, but it's close. We were touring mammoth hot springs some years ago. The tour guide noted that most of...
  2. D

    Minimum Residential Roof Overhang

    *fig 802.7.1.1 has been interpreted and drawn incorrectly. Chapter 8 - Roof-Ceiling Construction It does not appear in my 09 VA IRC, nor do I recall it from previous versions. I have seen that picture in a magazine article written by a 25 year old framer. Can anyone say when it first...
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    Minimum Residential Roof Overhang

    A Cape Cod style, no overhangs prevented ice damming, difficult to vent nowadays.
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    catheral cielings ridge beam

    You can use a table, correctly or incorrectly, you can ask the kid at the building supply to use a manufacturers software for an engineered product such as an LVL, which will yield the same results as the table. The manufacturer will give you the software to do the same thing if requested, the...
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    ledger not for decks

    As I see it, the deck rim joists from house ledger to outer deck rim beam were uniformly loaded, they now support a wall and part of the roof, a healthy increase and point load on the ledger from the new rim beam that supports the bearing wall. This load needs to be quantified and the new beam...
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    ledger not for decks

    The girder and header table is a table of uniformly loaded beam spans. But, the ledger attachment specs are for a uniformly loaded ledger. I agree with you that it would be inappropriate to attach a beam, girder, header... a concentrated point load, somewhere along the length of a ledger that...
  7. D

    Vaulted Ceiling Using Heavy Timbers

    4x is dimensional lumber rather than heavy timber (5x and up) so the design values are based on the dimensional lumber specs in the supplement to the NDS available on the awc.org website. Then the provisions of the AF&PA's NDS. As for prescriptive design, well, you don't have prescriptive...
  8. D

    Roof Lumber sheathing

    From memory I believe 16" wide is the published minimum width from APA although we've all pushed that one. Clips or edge support doesn't make that go away. You can rip the previous row to get an adequate width on the top strip. I normally use 5/8 roof sheathing, if the needed top strip is small...
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    Roof Lumber sheathing

    The clip is there to prevent the sheets from buckling in different directions, it holds alignment. I've seen ugly seams telegraphing thru when they aren't used so I always use them, no big deal, and they maintain the gap. If the panel needs to move it will crush the area around the clip without...
  10. D

    Beam member connection

    If you look at the reactions on that bottom end that will usually work and I've done that. A dragon beam of one type or another is the "correct" way to handle that detail.
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    2x8 Hip Rafter Failure

    As much as I hate more pages and tables their purpose is to avoid having to engineer things over and over that have the same solution. It makes common solutions prescriptive. I would rewrite the code language that all hips and valleys need to be designed as supported myself and then reference a...
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    Beam member connection

    Ah, I was going from memory, the NDS increase from base design value is for 3 or more members and yes it applies to built up beams. I'd have to dig in old texts to find where it was applied at 2 or more members, the NDS is being more conservative, which is good. The increase is due to load...
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    2x8 Hip Rafter Failure

    I suspect simply because no one has proposed it
  14. D

    Beam member connection

    For a typical header in a 2x6 wall I'll have a 2-1/2" gap between the header members with a 2x6 above and below flatways, a hollow. insulation filled, tube. Top loaded and no problem, can still take the repetitive member adjustment as the members are spaced closer than 24". If a built up girder...
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    2x8 Hip Rafter Failure

    This was a table I saved from an article in JLC some time ago. There's really no reason there couldn't be a prescriptive table. Hip/Valley Chart2
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    2x8 Hip Rafter Failure

    Done the truss, darn uncomfortable, repaired and went back to hand framing. For many situations I'd probably let an LVL supplier do the math, say for a cathedral valley. If you're bored at some point JAR run a few larger scenarios on strucalc with the hip a size above and SS and see where it...
  17. D

    2x8 Hip Rafter Failure

    First a point of grading order; #2 is the standard grade, then #1 is stronger, then Select Structural (SS) For in the field quick grading, SS is very clean, almost clear, very small well spaced defects. Then remember quarter, third, half. The cross section through the piece for a #1 can...
  18. D

    2x8 Hip Rafter Failure

    Hopefully attached another graphic showing the tributary area just to show the plane it's on maybe clearer. I'm coming up within spitting distance longhand with max moment of 1478 ft-lbs compared to your 1509, min req'd section modulus @ 1208 psi is 14.68"3 a 2x8 has a section modulus of...
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    Questions I wish I had an answer to: Contractors, Inspectors, Architects, Homeowners

    1) A lawyer refers to that as a class action suit. 2) See 1 The wheels on the bus go round and round :)
  20. D

    Landing on an exterior door.

    The footings for the support posts need to rest below frost depth on undisturbed soil. If close to the building the undisturbed soil you bear on cannot be closer to a previous excavation than a 45 degree angle from its' edge and depth... you can't perch on the edge of the old foundation hole...
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    need a prayer if your able

    Wilson, I immediately felt comfortable with you, there are several of you that I've thoroughly enjoyed breaking bread with. I'm getting ready to go marry off a young nephew, my brother in law was 42. I see him in his childrens eyes and qualities. That is success. Strength of character and...
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    Overloading??

    And another fire there. Empirical is not everything other than engineered. No disagreement on whether you are wearing any clothes.
  23. D

    catheral cielings ridge beam

    Happily, we're not designing spaceships here. What we are talking about here is pretty basic stuff. I would prefer we broaden understanding so that those around us aren't just looking over their upturned thumb or pulling ridge sizes out of air without knowing the design load. Mark's approach...
  24. D

    catheral cielings ridge beam

    Check the tables as simple beams.
  25. D

    catheral cielings ridge beam

    Yes Fatboy, if the rafters are hanging from the ridge and assuming the ridge does not sag, there is no outward thrust. Having checked thrust against the heeljoint table and connection capacity, I am also curious where that engineering came from.
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