Recent content by d1eng

you can go to: http://www.reiworld.com/Product/Pro/Tutorials.asp Thats a great web site with a bunch of tutorials and links to show you the great range of capabilities of staad pro.

thanks. which one would be better for modelling a rhs section?

thanks alot for ur help dvd

hi, Im new to STAAD and i would like to know how to define members that are not predefined in staad pro. Members such as Rectangular hollow sections (RHS). and square sections that were cut in half along its length.

Thanks alot for your replies. DVD, that torque is the torque required by the power screws and not the chain drive. The radial brgs have a sliding fit on the shaft and is press fitted to its housing. no need for tapered brgs. I guess, it would be best to estimate the starting torque of the chain...

Yeah, I see your point about the final torque. The lifting device would have a capacity of 450lbs. The outer screw diameter is 1 1/4". and the inner screw dia. is 1.05" and the pitch is 5 threads per inch (acme threads). The final velocity can be anywhere between 40 to 50 rpm.

Thank you for replying. I did consider chain tensioners but was unsure which span to place it on. Now that i know where to put it, wouldn't this eliminate the slack on the span after the crank? I am still unsure as to what approach should i take to determine the starting torque of the chain...

Hi, I have 4 vertical power screws which are all linked together by a horizontal chain and sprocket drive. So i have 4 sprockets of the same pitch diameter (one on each screw) and 1 chain (running on the periphery of all the the sprockets). There is a handwheel ontop one of the power...