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  1. nhstruct

    Depth of Interior garage footing

    I am looking for everyone opinion on the proper depth for the interior footing in an unheated garage. We do many apartment buildings where the basement is a parking level. The perimeter wall is designed to be 4'-0" below grade minimum (standard frost depth of the region), however the footings at...
  2. nhstruct

    typical wood header detail - dropped header or below double top plate

    I typical have the header up high, and a double plate at the window. I have had to many cazes where the contractor srews up the elevation and has to cut out the header. This solves that issue, yes on longer spans you need to verify that the top plate can take the lateral loads. as far as...
  3. nhstruct

    Revit for wood structures

    It really depends onthe situation. I am currently doing a wood structure in revit. Our firm does a bit of everything and we are working are way towards using revit as the primary drafting program. I find the model take a little longer to buildind than drafting a floor plan, but the details go...
  4. nhstruct

    Loose Lintel for Brick Veneer

    I actually Have a project going now with a 7 3/8" cavity. We needed a relieving angle to pick up 3 stories of brick we ended up with a L8x7x3/4" angle (from memory i don't have the plans in front of me) We have wood stud walls, so ended up putting steel columns in to support the lintels. The...
  5. nhstruct

    A truss designer on the project I a

    I have just delt with this on two projects. If it is stated on the drawings they must provide it. We carry it as a live load, as MA building code requires it. We usually get a call from the truss designer with the comme ts you mentioned, I just let them know that iBC requires it and they must...
  6. nhstruct

    Bent plate in lieu of steel relief/shelf angle

    I just had the opposite situation we spec'd a 8"x7"x3/4" bent plate for a releiving angle, but the contractor wanted to us a L8x8x3/4, we let them use the cut angle. I don't think it is onsite yet, but if it is distorted, we will have them replace it.
  7. nhstruct

    Stone Veneer on Wood

    Per code ACI530 Chapter 6 Section 6.2, height limits above non combustible foundations is 30'-0" to top plate and 38'-0" to top of gable with wood framed backing. In our case we do not have a gable as it will be a mansard roof set-up
  8. nhstruct

    Stone Veneer on Wood

    Thank you for the responses, the 33' limit is what we found in ACI-530. We have not determined exactly where the releiving angles will go yet, but we are thiniking we will need one at the 3rd floor level, and 4th floor level. As the code also recommends only 12' tall of brick when supported on...
  9. nhstruct

    Stone Veneer on Wood

    I have a wood framed project with 4" brick veneer. The veneer bears on a shelf on the foundation wall and extends 42' tall. Per code we can only go about 33' without needing a releiving angle. Has anyone attached a relieving angle for clay masonry brick to wood framing. Neither me or my boss...
  10. nhstruct

    Odd size Cellular deck

    I am working on a manufacturing building, built in the 1950s'. In the area we are evaluating the Mezzanine level has what appears to be 2" non-composite cellular deck with 2" concrete (4" total thickness). I can find information on a 2" composite cellular deck, but not a non-composite. can any...
  11. nhstruct

    Wood beam reinforcement, mixed sections LVL with built-up

    I have always figured out the required capacity, and compare it to the actual capacity of the exist. beam. Then design the reinforcing to take the rest. Then design the connection of the knew to the old with the difference. Make sure you also check the bearing capacity of the beam, as you may...
  12. nhstruct

    Identifying Open Web Steel Joist

    If you go to the SJI website they have a online form to fill out and will tell you what size the joist appears to be. From my experience with them, they will get back to you the same day and are fairly accurate.
  13. nhstruct

    CMU wall over existing slab

    I just had a similar situation, Typically I don't like CMU walls on slabs less than 6". We showed on our plans that new hunched slabs at CMU wall locations, but made a note that the contractor to verify the thickness of the existing. slab. basically if we find the slab is about 6" or greater...
  14. nhstruct

    Capacity of existing wood joist

    The way I have always done it us to use the present value for the wood, typically the wood wood around here is either hem-fir or doug-fir.
  15. nhstruct

    Existing Joist Size: DH series??

    If you can measure up the joist, the SJI website has a form that you will out, and they will get back to you on what they believe the joist is based on the measurments
  16. nhstruct

    IBC 3402.2 Renovation / Alteration

    Typical when I look at an existing building I will accept the building as being fine if I'm under 5% overstress. I am willing to accept this for several reasons, the theory of design does not account for load distribution through the floor/roof diaphram, the there is a safety factor in...
  17. nhstruct

    Breakaway (frangible) Walls

    Typical what I do is simply design it so that the fasteners that hold the wall in place will failure just below the force required by the water pressure, Typically I will use just screws into wood, and powder actuated fasteners into concrete. place just enough to resist wind.

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