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  1. stanleyshum1997

    Wood framed buildings

    I can tell you to watch out for continuity of tie beams of ceiling and roof lines over dormitories. Provide a nailing schedule for jeep broad and plywood wall with hunch beam opening according to standard codes. You have to search for the nail schedule. To watch out for zone requirement for...
  2. stanleyshum1997

    Rainwater harvesting pipe size calc

    If the storage tank is above ground, you can only collect the roof runoff. Make sure there is enough slope for the runoff and the pipe. The usual slope of 1" to 12" is not enough. Make clean-out every 100'. Anchor blocks are required in entry corners. That is where the pipe is bent. Always...
  3. stanleyshum1997

    Plate deflecTion FEM

    Different finite element programs have different level of expertise. For example, Lisa-fret calculates according to mechanical equations from strength of material without the reduction factors to different materials and the safety factors to factored loads. But finite element programs like...
  4. stanleyshum1997

    Truss design misconceptions

    It is clearly stated in the book, "Structural Analysis," by Hibbebler that a truss is statically determinate when b+r=2j and statically indeterminate when b+r>2j. And the truss is unstable when b+r<2j. Where b is number of member, r is number is number of external reaction and j is the number...
  5. stanleyshum1997

    Truss design misconceptions

    Even a piece of furniture has to be sealed by structural engineer by law let alone a trusses. Since the trusses is only a part of an entire structure, you might get away from law with a seal from an vocational institute.
  6. stanleyshum1997

    Truss bearing point at interior?

    When you have an interior support inside the bottom of a trusses, the trusses is not no longer consider as a trusses. The trusses becomes a frame and you no longer have the triangular stability a trusses promised. In other words, the trusses is unstable? In other words, you have to design the...
  7. stanleyshum1997

    Truss bearing point at interior?

    when there is an interior bearing wall along the bottom of the trusses, the trusses would consider a frame action including the trusses and the perpendicular bearing wall below? disclaimer: the answer is not taken to be correct unless approved by a senior engineer.

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