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Recent content by Mb87

  1. Mb87

    AS3990. Restraint against torsion.

    Mech Eng looking for clarification on structural calcs. Have a beam (loaded on the bottom flange via pillow block) The beam is held by 2 bolts in a cleat through the web at each end. From what I can tell, the beam should have an le=1.2x span From 5.9.3.1 le = span but from 5.9.6 factor...
  2. Mb87

    Grating Design

    Thanks for the replies, This is the approach I was working on in the first post. for the Davit just assume the grate does nothing (for the Davit) and the Base plate and its bolts into the frame are the only thing carrying the forces for the Davit
  3. Mb87

    Grating Design

    Thanks for the prompt reply. The photo was just to show the fixing thru the mesh To answer your questions, It can be used in all directions, so need to assume it might get used in all directions. yes, the arm is very short. it's for confined space recovery directly below its position, In...
  4. Mb87

    Grating Design

    NOTE: This is in Australia so will be referencing AS I have a walkway on one site that has had a confined space davit attached (been there for probably 10 years), and we want to have records of design check comps so I'm producing a few reports. I'm familiar with AS1657/AS1170 and will use that...
  5. Mb87

    AS5221.1:2021

    In the new crane load standard Table 2a references the "characteristic vertical load displacement." "calculated statically from the elasticity of the crane and its supporting structure and teh roam system using the appropriate maximum gross load value without amplifying factors" I take this as...
  6. Mb87

    AS1418.18

    Thanks for the reply BJI While were looking at this case, the standard has no actual reference for unstiffened webs all Web buckling relies on patch loading based on stiffener spacings. Tips?
  7. Mb87

    AS1418.18

    Got a small project for some crane runways. common design. portals, with a UB on corbels. Just doing all the design checks and I have come to a halt at vertical web loads. Most of this is pretty straight forward except for a factored bending moment. There is no real mention of this can I just...
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