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  1. ichibansan

    Existing ductwork: whose responsibility?

    Wow. Can't believe this was dredged back up. Depends on you definition of working "fine" for 20 years. The previous owner (ABC) admitted to having high utility bills, but apparently never had issues with paying them. Up until installation of the new unit and air handler, there was never...
  2. ichibansan

    Seismic: Vertical Distribution of Load

    Equivalent Lateral Force Procedure... Seismic Base Shear V= Cs x W Where: Cs = variable depending on accelerations,response modification, etc. W = the TOTAL dead load (plus applicable portions of other loads) --------- Fx = Cvx * V Fx = Horizontal seismic force induced at any given level...
  3. ichibansan

    Concrete Proportioning - Field Experience Basis

    In looking at ACI318-02, I am a bit confused with regards to an item shown in the flowchart of Figure R5.3. The item reads: "Field record of at least ten consecutive test results using similar materials and under similar conditions is available" This seems odd to me. Isn't the point of...
  4. ichibansan

    Waterproofing - Equivalent to concrete cover?

    Here's the situation. A large base slab for a rectangular tank has been poured. The vertical dowels projecting out of the slab for the future walls have been cast, but unfortunately they have been improperly located such that they have 1.5" of clear cover as opposed to the specified 2" as...
  5. ichibansan

    Brick Veneer Arch: Design Software Program?

    For those of you that have designed arches by hand using the BIA technical bulletin 31, you know where I'm coming from on this. Does anybody on here know of a software program available for design of brick veneer arches? The design procedure published by BIA is as tedious as it gets... it's a...
  6. ichibansan

    Existing ductwork: whose responsibility?

    I have a question for you guys, if you have a minute. Homeowner ABC has been living in an old house for several years. The home was originally built over 20 years ago, and the original ductwork and HVAC components have been in place ever since. Homeowner ABC hires XYZ AC Company to install a...
  7. ichibansan

    Piggyback wood trusses - connections.

    posted by SteveBausch "Why is the vendor not being advised of the need to section the truss? If the vendor is expected to provide remedy for truss failure, they won't like the surprise of "Oh, we cut them in half for transport". Be honest with the poor guy. Tell him upfront...
  8. ichibansan

    Piggyback wood trusses - connections.

    Jed- I agree 100%. Thanks for the reply. Got in a little bit of an argument with a fellow engineer in our office with regards to this question.
  9. ichibansan

    Piggyback wood trusses - connections.

    When a wood prefab roof truss must be broken down into two pieces for shipping purposes, whose responsibility is it to provide the design for the piggyback truss to base truss connection? The structural EOR, or the truss designer?
  10. ichibansan

    Help! I'm Sick of CAD.

    Wrightguy- Get the remaining required coursework, get your FE, and get your PE. I admire a person that is willing to sacrifice a little short term gain for long term dividends. If you follow through on this, you will not regret it. However, as others have alluded to, it's not a walk in the...
  11. ichibansan

    Crushing of Composite Metal Deck

    Is there a specific procedure for checking "crushing" of composite metal deck? This would occur where the deck passes over the supporting member and directly over the member sits a wall inducing a large line load. The metal deck and slab are essentially sandwiched between the bottom...
  12. ichibansan

    Unbraced Length, Lb, of bottom flange in compression....

    Say I have a cantilevered W-section beam with a backspan of 25 feet and the cantilever extending 8 feet out over a column support. There is uniform loading (due to concrete slab, etc.) along the entire length of the beam, and there is a substantial concentrated load at the end of the...
  13. ichibansan

    increase in allowable stress due to duration

    Is it permissable to take a 15% increase in allowable stress of wale beams used to brace/support sheet piling around a 30'x32'x26'deep excavation? Obviously, the shoring is temporary, hence the increase. Any comments?

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