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  1. StructMB

    Venting holes when welding to sealed HSS

    To kootK: 1 , 2 & 3) Bottom chord panel points at 10' c/c, Truss span = 50', Warren Flat Truss Configuration with first diagonal in tension, Truss clear height= 85", 5 panel points at truss top chord equally space at 10' c/c. 4)The top chord is the same as the bottom chord (HSS 6x4x1/4") and...
  2. StructMB

    Venting holes when welding to sealed HSS

    To: Lomarandil Nobody knows when this deformation did happen. The only area where the HSS side walls are not buckled is where the reinforcing plate was added and locally at the sway trusses ("diagonal bridging") where their vertical connection plates provided enough stiffness to preventing the...
  3. StructMB

    Venting holes when welding to sealed HSS

    To Canwesteng: I sure look like web crippling but it is not localized under the diagonal connection. In fact the buckling is uniform for the entire length of the bottom chord making it hard to explain.
  4. StructMB

    Venting holes when welding to sealed HSS

    To jgKRI: The bottom chord is pretty leveled. Actually, the truss was cambered 3/8" in order to achieve a "perfect" levelness under the concrete floor self-weight. I just wanted to touch base with somebody to find out if there is enough heat generated in the welding process of this...
  5. StructMB

    Venting holes when welding to sealed HSS

    The web members are also made with HSS. But the observed bulged is for the entire length of the bottom chord. It it is not only localized at one connection. We suspect that the plating was added on site during erections. Nevertheless, could it explain the bulging of the entire bottom chord?
  6. StructMB

    Venting holes when welding to sealed HSS

    I was asked to comment on a deformation observed on a truss's bottom chord fabricated with an HSS. Indeed, the two side walls of the HSS are bulged out for approximately 3/8" for the bottom chord's entire length. It does not seem to be an overstress problem since this member is most likely...
  7. StructMB

    Structural steel Yield Strenght in Hot Ambient Temperature

    Thank you "Tolchijb", Appendix 4 has exactly the information I was looking for.
  8. StructMB

    Structural steel Yield Strenght in Hot Ambient Temperature

    Hi, I am using structural steel sections (ASTM- A572- Gr. 50) in an industrial environment where temperature gets relatively high around specific equipment. More precisely the steel will be at around 150 degree Celsius (300 degree Fahrenheit). I was wondering if the steel yield strength will...
  9. StructMB

    Construction Cost of Driven Steel HP Piles

    What would be the construction cost of a steel driven end bearing piles (HP 12x74 - 30 ft long)? The piles will go through silty sand.

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