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See below for Virtual work calcs. Bending occurs about the axis which the bolts are on, as described in the original post I referenced. The plate works OK.

thread507-434905 My calculation for the baseplate capacity in the thread I have referenced: (1) Calculate the bolt tension. I would use the lever arm from web of the 50SHS to the line of bolts. e = 25 - 2.5 = 22.5mm (assuming 5mm wall) M* = 3.2 x 0.4 = 1.28 kNm T*b = 1.28/(0.0225x2) = 28.4...

Hi Australian Standard AS4676 - Structural Design requirements for Utility Services Poles - includes an "informative" appendix on the design of piled foundations in soil, for a range of soil bearing capacities. Namely Appendix I. Footing designs for piled foundations are also tabulated. The...

The deemed to comply moment redistribution approach in AS3600 is written with beams and slabs in mind. At least, in numerous well known text books, the moment redistribution aspects of the code are discussed in reference to beams and slabs only. Some texts even go so far as to state that...

Yes - it is a rigid frame and it is providing lateral stability. The beam sits on top of the column and has 6 M36 high strength cast-in holding down bolts into the column. The beam has a 36mm thick baseplate. Beam = 900WB Span = 16.0m + 3.0m cantilevers Column = 700 Dia Height = 5.5m to...

Hi In checking an existing structure consisting of a concrete floor slab supported on steel beams (UB section secondary beams support slab, WB section primary beams support secondary beams, and concrete columns support the primary beams): The typical frame for the primary structure = a...

Hi My question is regarding the use of "allowable" lateral bearing stress in rock, in the case of a cantilever pile wall design. The design scenario is a concrete pile wall (soldier pile, or contiguous pile) where the restraining material the piles are embedded into is rock (say Class V...

Mike See attached for an extract on Brom's Theory for laterally loaded piles in cohesive soil. Tomhttp://files.engineering.com/getfile.aspx?folder=8d33f717-aa8f-4532-99ed-cd59651bf7c6&file=Broms_-_extract.pdf

Hi GeoPaveTraffic Thanks for the reply. The following discussion is intended for the benefit of my general understanding. In a real project I would rely on the advice of the project geotechnical engineer I would like to raise a specific design example to talk further on this subject. The...

Hi I am a structural engineer asking a soil mechanics question. Not after an in-depth answer to the following. Why is the ultimate capacity of cohesive soil to restrain a laterally loaded pile related to the Undrained shear strength of the soil? EG, Broms Theory uses 9*Cu. My basic...

Hi Does anyone know whether the structural software "Robot" performs a critical buckling analysis of a 3D steel frame, and if so how the results and available output compares to the more familiar softwares such as Microstran or SpaceGass. Not having spent a lot of time using Robot - I dont...

Thanks for your feedback I note the following: I tend to agree that using purlins for this purpose is problematic because of the slotted holes, but only from a serviceability point of view. In regards to the ultimate capacity the structure cannot fail (if it is designed properly) as it only...

Hi Anyone had experience (in large steel framed buildings) in utilizing the reserve compression (or tension) capacity of roof purlins (cold formed metal C's or Z's) as part of the roof bracing system for restraint against wind loads. I have seen use of "battened purlins" - in lieu of typical...