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  1. ShawThing

    AS4100 Clause 6.6 Restraints

    Hi Currently involved in a project where a commercial building is being converted into residential units. The roof structure consists of steel roof trusses at 6m centres as the primary roof members which support purlins. The bottom chord of the truss has fly bracing each side at regular centres...
  2. ShawThing

    AS2870 Building Raft Foundations on top of ground

    Hi Was wondering if there are any issues building a raft foundation system on top of the building pad (similar to a waffle pod slab) rather than excavating the foundations into the building pad? The pad would effectively have to built up to underside slab level with 200-300mm of suitable fill...
  3. ShawThing

    AS3600 - Unreinforced Rectangular Stormwater Drainage Pits

    Hi Have been asked to design some unreinforced rectangular stormwater drainage pits. Assuming the size will be limited to a point where the maximum tensile strength of the concrete is not exceeded, so 600-900mm maximum wall widths. Just wondering how the minimum reinforcement requirements of...
  4. ShawThing

    AS 5532 Manufacturing requirements for single point anchor device used for harness based work...

    Hi All Is anyone familiar with this code and whether the rated loads nominated within are required to be factored up for design or adopted as specified? Regards
  5. ShawThing

    FRP for Structural Adequacy for Concrete Walls

    Hi My question is in relation to clause 5.7.2 of AS3600 paragraph 2. Does that mean if you have a steel wall head/wind beam supporting the top of a panel like you might have between steel portal frames (like a PFC on its flat for example) that you can adopt the panel thickness values in table...
  6. ShawThing

    Reinforced Concrete Stormwater Pits

    Hi All Putting strength requirements aside just wanted to confirm or otherwise that wall for reinforced concrete stormwater pits should be designed to satisfy the requirements of AS3600 Clause 11.7.2. These walls would typically have exposure classifications of B1 or B2 resulting in horizontal...
  7. ShawThing

    External Concrete Pavements - Saw Cut Joints

    Hi Everyone Obviously saw cut joints is a fairly basic concept but I've been wondering how people treat them in respect to what is done to the mesh, depth of cut and how cover to reinforcement is maintained. There is the common cut every second bar, cut out every second square, depress the cut...
  8. ShawThing

    AS2870:2011 Design of Footings for Trees

    Hi Everyone I was wondering if anyone has had much experience with adjusting the ys value to reflect the potential influence of trees in accordance with Appendix H of AS2870:2011. Also how you might take into account the presence of trees that might have been cleared and no longer exist but...
  9. ShawThing

    Lintel / Wind Beam Residential Timber Framed Construction AS1684

    Hi All Just chasing some advice on when a lintel over an opening no longer can be considered a lintel (which typically is restrained laterally by the roof trusses) and has to be designed as a wind beam. For example you might have a lintel directly over a 2100mm high opening with a 2700mm high...
  10. ShawThing

    Calculation of Foundation Loads for Silo

    Hi I am requiring to calculate the distribution of wind loading forces on a circular silo's foundations which are located on three different pitch circle diameters. Is the best way to do this to assume a unit value for each location, calculate the moment of inertia of the foundations and use...
  11. ShawThing

    Maximum Length of Rod Bracing in Lateral Roof Trusses

    Is there a maximum length that diagonal rod bracing may be used for lateral roof trusses after which you revert to an angle section? My understanding is that pretension will negate most of the sag or alternatively they could be supported via the roof purlins. I have diagonal members that will be...
  12. ShawThing

    Casting in glass balustrade support post

    Hi Just wondering how people would approach calculation/verification of connection adequacy of a glass balustrade support post that will be core drilled and epoxyed into an existing slab? Cast in depth will be minimal, say 150mm. Cheers!

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