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Hi dik, Yep yep, definately a formula for amber lights. The reaction times given in those guidelines are in the order of 1.5 - 2.5 seconds. I assume that these have safety factors built into them and allows for people of all ages...like 'The Snake':P I'm more interested in driver reaction to...

Hi all, I'm trying to work out the average/85 percentile reaction time for drivers responding to a green light at a set of traffic signals. My hunch says about 0.7 seconds and google seems to verify that, but I can't find any 'accepted' time in traffic guides i.e Austroads/RTA/Roads ACT...

The ACT, but apparently the governing body (Territoy and municipal services) have no say in the layout/design of privately owned carparks.

Thanks Rowingengineer. It's the reference to "percentages of capacity" that is confusing. If they just said 1st 100 cars then expect 3 vehicle lengths, 2nd 100 cars - 2 vehicle lengths etc it would make it a bit easier. The traffic engineers are telling me, a traffic engineer in making, to...

Hi, Would someone please explain how to use table 3.3 (minimum queue lengths at a car park with control points at entrances) in section 3.4? I'm working on a carpark with 1800 carspaces and with less than 75% in-flow during a peak period (about 500 cars). The code says the first 100 cars: 3%...

Sorry guys, one more question. This beam will have bonded PT above the pipes. As the PT is only running across the top half of the beam, I'm assuming: 1) Secondary moments from PT are calculated based on the top chords properties and are resisted only by the top section. 2) The bottom...

Wow, that's an awesome paper. Thanks so much.

Hey all, I've been asked to design a 700 long by 300 wide column (4.5m tall) with a 150 diameter down-pipe cast in the middle. This scenario seems a little odd to me but hey that's architects. Anyhow, I have no problems with do the basic moment/axial analysis and checking the reduced web...

This project has been running for a year and half now and they only just realised (last week) that there was insufficient headroom to run the pipes beneath the soffit. And our beam depths haven't changed during that period. I was just assuming they'd use plastic sleeves, but a formed void is a...

Thanks all and sorry for not getting back to you yesterday. Ishvaag, afraid I don't have any decent FEM software, at least none that could handle this sort of thing. CSD72, that sounds like it could work I'll have a play around and see what I can come up with. Yes there is 50mm of concrete...

Hey all, Does anyone have any good references on how to analyze a concrete beam with a pipe cast into it? The pipes run the full width of the beam, perpendicular to the span. The Hydraulics guy wants to run 5 100mm diameter sleeves through a concrete beam at 150mm centres, 200mm from the...

I think you guys have complicated this simple procedure just a weeeee bit :P I assume you're analyzing this one way slab in strips perpendicular to the main beams. In the analysis just increase the length of the cantilever by SQRT(2) and keep your reo running in the same direction. Also with...

An interesting proposal, what are the column dimensions? Would a ripout-box be an option instead of couplers? That'd give you 30mm of bearing to help with shear transfer...although the column reo cage would be reduced.

Thanks guys, but I was looking for a more comprehensive guide if one exists. Something that would cover everything from weld degradation, connection design, out of plane deflection/warping for beams due to thermal expansion etc.

Hey, Does anyone have any decent texts, papers or guidelines for designing HOTTTTT steel beams? I'm talking 300-500 celsius and changes in temperature will be about the same magnitude. Thanks

ok, kikflip could you please explain your original post.

kikflip/jakey, how don't they comply with AS3679 and what bolts are we getting then?

Toooo easy, thanks.

Hey, sorry if this is been posted before I did a quick search and couldn't find anything. Where does the idea come from that a footing is considered structurally safe when the resultant of the moments is within the central third of the footing? Can anyone recommend a decent text/paper that...

Sorry can't give any advice deflection of a crash wall for trains. I've recently specified a cantilevered car barrier that has been designed to have large deflections, the testing video showed it rotating till it almost hit the ground. The increased deflection reduced the equivalent static...