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  1. Toby43

    AS3610

    Hi all, Just looking for peoples thoughts/opinions on the following. A project we are involved in calls up in the Spec. "surface finishes shall be in accordance with AS3610....." I take this as only been applicable to formed surfaces as that is within the scope of AS3610. The builder however...
  2. Toby43

    125x50x2.5 RHS?

    I've just measured onsite a 125x50 RHS section. Does anyone have any information on these as it must be a section size before my time or simply a rare one, maybe imported? My approach at present would be to assume grade 250, or is this too conservative. I'm in Western Australia Cheers Toby
  3. Toby43

    Electric vehicle charging stations under building

    Hi all, I am just starting on a new 3 Storey project. Office and parking at ground with 2 levels of Residential over. I am designing the floor and its supports over the parking for an Fire resistance level of 120/120/120 (Structural adequacy/Integrity/insulation) I just received a drawing of...
  4. Toby43

    Historic I-Beam Information

    Hi all, Anyone have any data on historic I-beam shapes use in Australia (specifically WA). I am assessing an existing building which has a 360 deep I-beam with a flange width of 140mm which doesn't match todays profiles. Building is circa 1950-60. I'm specifically chasing the steel properties...
  5. Toby43

    Existing Steel Structure 1985

    Hi all, I'm looking at a steel structure designed and constructed in 1985 (AS1250 I believe) and was hoping someone may be able to help us out with steel grades used in that era in Australia. Specifically I'm looking at Equal Angle sections and bolts Thanks in advance Toby
  6. Toby43

    Multispan Sawtooth Roof - AS/NZS110.2 APP C

    Hi all, I have a query regarding the appropriate selection of pressure coefficients from Table C2 in AS/NZS1170.2 APP C. (attached) Do you sequentially take the roof pressure from the windward wall. I would do this, but For example - 0 degree angle of attack 2Span Sawtooth Roof -- are the roof...
  7. Toby43

    Mitek "Studlok"

    Anyone got experience with these tie-downs? or something similiar?. I'm starting to see Prefab timber suppliers using these. They are basically a screw fixed down through timber top plate into the end grain of the timber stud. I know most timber codes provide some sort of capacity reduction for...
  8. Toby43

    Sds ASCE7->1170.4

    Hi all, Re-posting this from last year. --Does anyone know if the Sds "design 5% damped spectral acceleration parameter at short periods..." (from ASCE7) has an equivalent in AS1170.4? Assuming it is equivalent to KpZCh(T) where Ch(T) is taken at short periods (i.e. at its maximum value) ASCE7...
  9. Toby43

    Tilt Panels - Horizontal Joints

    Hi all, Have got a project that is a Single Storey Portal frame shed with Tilt-up Cladding panels. Now the spacing of the Portal frames is approx. 6m and the Panel height to eaves is approx. 10m. Such large panels as one may pose an issue with craneage, so I am considering splitting the panels...
  10. Toby43

    Seismic Design of OCBF

    Hi all, I'm curious about the AISC341-16 provisions concerning Ordinary Concentric Braced frames "OCB" (I'm in Australia so don't know the standard that well). It states that the slenderness of the braces in a "V" type configuration must satisfy Lc/r<4sqrt(E/Fy) I understand this seems have the...
  11. Toby43

    Tilt Panels - Australian Fire Reg's and Ply Roof Diaphragm

    Hi all, I have a job in the works with tilt panel walls (basically a single storey big box) with a timber ply ceiling. I am happy to structurally use this ply ceiling as a diaphragm, yet am not sure if I can comply with the Building Code of Australia (BCA) regulations that stipulates the panels...
  12. Toby43

    Cold Formed Portal Shed with Tilt Panel Cladding

    Hi all, A client has proposed to use tilt panel cladding on the boundary (for fire reg's) attached to their typical Cold Formed Portal framed Shed. I personally don't think it is a good idea, I only have experience with using tilt panel cladding on Hot-rolled Steel Portal frame building(s) - or...
  13. Toby43

    ASCE Sds equivalent in aS1170.4

    Re-posting here to hopefully get more traffic... Hi all, Does anyone know if the Sds "design 5% damped spectral acceleration parameter at short periods..." has an equivalent in AS1170.4? Assuming it is equivalent to KpZCh(T) where Ch(T) is taken at short periods (i.e. at its maximum value)...
  14. Toby43

    ASCE7 Sds equivalent in AS1170.4

    Hi all, Does anyone know if the Sds "design 5% damped spectral acceleration parameter at short periods..." has an equivalent in AS1170.4? Assuming it is equivalent to KpZCh(T) where Ch(T) is taken at short periods (i.e. at its maximum value) ASCE7 and AS1170.4 don't compare well in regards to...
  15. Toby43

    Circus Loads

    Hi all, Anyone have information regarding magnitude of loads to consider in the assessment of structures to support "trapezes" and similar Circus activities ("Silks etc...). I have a client wishing hang a trapeze off an existing roof structure. I am having trouble pinning down appropriate...
  16. Toby43

    Torsional Bracing of Beams

    Hoping to get others thoughts on the following... Would you consider beam B2 in the attached sketch to torsionally/rotationally brace beam B1? Details: B2 is timber and fixed to main lateral system. B1 is a steel I-beam and is part of a moment frame, hence bottom flange compression. My take on...
  17. Toby43

    Spacegass Cursor Bubble

    Hi all, I have somehow managed to make the selection cursor bubble really big which makes it a pain to select nodes and members. Anyone know how reduce?? Thanks in advance
  18. Toby43

    Mezzanine inside Tilt up Building - Lateral Stability (Seismic)

    Hi all, It is proposed to have a storage mezzanine built into an existing single storey tilt panel building. It only partially covers the plan area of a unit and its attachment to the existing building is to 2 parallel tilt walls (at 3m elevation of 6m tall panels), which I'm happy to utilize...
  19. Toby43

    AS/NZS 4600:2005 - Clause 5.4.2.5 Screws in shear

    Hi all, This clause states "The nominal shear capacity of the screw shall be determined by testing in accordance with Section 8 and shall not be less than 1.25 Vb where Vb shall be calculated in accordance with Clause 5.4.2.3." CL5.4.2.3 relates to tilting and hole bearing, which depends upon...
  20. Toby43

    Braced frame on Long Strip Footing

    I have a scenario where a steel bracing frame is situated on a long strip footing. The frame columns are 2m apart and impart a overturning force of 70kN (1 up , 1 down) each to the footing, which is for other purposes approx. 15m Long. Frame situated approx. central along length of footing...

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