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Hi Fellows A urgent question. I designed a factory shed last year, and they are building it now. The rafter is 310UB slope from one end to another, span 20m, with 3m haunch both end. The column is 360UB, high 3.6m at on end, and 5.2m at the other. The rafter rigid connected to the column. There...

Hi Fellows I am designing a not spill - through abutment (which means also act as the retaining wall). And I am finding difficulty to find out when is the maximum over turning moment happen, I means at which point under M1600 (AS5100). What I means is when the load is moving, part of the load...

Hi Fellows I am a new engineer, and going to design two bridges (precast decking and abutment) over two creeks, the bridge may be only one span, or two spans. And I am going to do the site inspection later. Could anyone tell me if there are anything I need to be aware on the site, or any...

Hi Fellows I am designing the bearing pad support the bridge beam. And I have a question about the creep and shrinkage displacement at the bottom of the beam. My case is, the prestress beam I designed is allow the cracking under the full loading, and my question is after the beam cracked at...

Hi Fellows I am designing the bearing pad support the bridge beam. And I have a question about the creep and shrinkage displacement at the bottom of the beam. My case is, the prestress beam I designed is allow the cracking under the full loading, and my question is after the beam cracked at...

Hi Fellows I am disigning the bearing pad support the bridge beam. And I have a question about the creep and shrinkage displacement at the bottom of the beam. My case is, the prestress beam I designed is allow the cracking under the full loading, and my question is after the beam cracked at...

Hi Fellows This seems a silly question. I remember one times I read a book talk about the stirrup, stirrup not just use for shear reinforcement, also use for holding the compressive and tensile Reo. in position when bending (resist the compressive Reo buckle outside). And this is why the...

Hi Fellows I am looking for the program to design the cold-formed steel structures according to the AS 4600. I know Sydney U is providing the program ColdSteel/4600. But it only consider one single member, but I want to input the whole Lysaght C & Z sections welded to make a truss and the...

Hi Fellows I have a problem about the steel plate design. Following is my case. I am designing a panel wall system to resist the flood water. The panel(5m length) is bolted to the steel plate at both vertical edge. And the steel plate is weld to the composite pile. So what principal I should...

Hi Fellows I am designing a slab for a pump station. I am considering the anchor depth and the vibration effect when the pump is operating. I talked with the pump manufacturer, but not much help from them. I would like to ask how should I deal with the vibration problem in concrete (Say...

Hi Fellows When should we consider the earthquake load design. From section 2 of the standard, it say not all structures are required to designed for earthquake load. So, is it depend on the size of the build or the location of the building. Any detail specification? Thank you.

Hi Fellows A question about the panel bearing. From page 30, it said the panel should be supported at one level by two (no more, no less) seatings in direct beating. But in page 10, the Figure 3 showed 3 piers support the panel. Did I miss understand something? Also, do any one know any good...

Hi fellows A question about old steel shed certification. How can I find out the steel capacity under corrosion. Thank you.

Hi Fellows I am designing some load bearing panel wall. And would like to use the angle support the UB bolt to the Panel. I would like to ask the min. distance between the first bolt centre to the edge of the panel. I read through the hand book. it just give a example and a shop drawing. But no...

Hi Fellows I am designing some load bearing panel wall. And would like to use the angle support the UB bolt to the Panel. I would like to ask the min. distance between the first bolt centre to the edge of the panel. I read through the hand book. it just give a example and a shop drawing. But no...

Hi Fellows I am designing a beam web side plate connect to support a 310UB rafter 2 degree pitch (say 50kn up or down)at mid span. The clear span is 12.1m. I try to use 410UB as the beam size. Fail in member bending if design as no flange restraint. Now if I weld the web side plate full length...

Hi Fellows The builder required me to add a N12 bars around the 100mm panel with 80mm cover to the edge. What is the purpose for it? Is it used for crack control at the support? so why the bar required to go all around the panel, not just at the bottom? what principal should i use to design...

Hi Fellows Would any one tell me in US unit the steel beam is present eg.( I 12" x 5" x 30 # ), Is it 12" - depth, 5" - flange width, and what is 30# mean (I assume it is thickness, but how is # related to ")? For steel beam in 1968, would I assume the steel strength 250Mpa yield and 410Mpa...

Hi Fellows I am designing an extension for an old building. And I digged out some old drawings. The design was on 1968. My question is at that time, the steel beam is present eg.( I 12" x 5" x 30 # ), Is it 12" - depth, 5" - flange width, and what is 30# mean (I assume it is thickness, but what...

Hi Fellows I just have a questions about the bolt in shear. Usually, we design a bolt with a bolt hole D 2-6mm larger. So, if one column of 4 bolts acting in shear, will it possible that just one bolt resisting the shear force, and the other 3 still not touch the edge of the hole? Did I think...