So what's your suggestion? I dont think I make the external one to be PT connecting to normal RC beams right? If so, can I make these RC beams to be PT and all slabs to be PT?
I have this slab over ramp as shown below.
The slab is meant to be 'PT by others' but because the cantilever slab over the ramp is going to the pickup the transferred loads from above, it is hard to make it cantilever that long. Instead, I am going to use the RC beams connecting to RC walls and...
Thanks guys.
Sorry my bad. It is an empty steel shell like drbrainsol mentioned. I have found something similar online as below.
It is an indoor one. I will do what you guys say - ask the manufacturer for more information.
Before that, I am wondering how it works normally. Do I apply the...
Thank you dhengr. I agree with you that it is normally the supplier's job and that's why I have never designed before. That being said, I have seen some engineers designing the steel lift shaft on their plans and for the current job I am working on I was asked to provide the design as well. And...
Hi, I have a steel lift shaft to design in a 3 storey apartment. Can anyone give me any example or any recommendation of books on this because I haven't done one before. Thank you very much.
Hi, I have this 7 storey building, the floor is gonna be timber according to builder's preference. The vertical structure will be concrete lift core with steel columns (no bracing can be used between columns). So my question is, can we reply the concrete core to take the lateral load like how we...
Many many thanks guys. I will take the first floor joist outside each injection point in positive moment area as the segment length for negative moment capacity check.
Just one more question regarding the 2.5% force that Agent666 mentioned.
As it is a beam instead of a column, how do I work...
Thanks jay. I understand the critical flange is in compression but I have problem understanding how long should the segment length be. For a continuous beam with floor joists on top under gravity load, which means joists can not provide restraint for negative moment area. Can I take the length...
Sorry but I don't quite understand. Does that mean I should take the length of the bottom flange in compression (say L/3 max = 2.7m) as the segment length?
HI Tomfh. Thank you for your reply. So if I have a two spans continuous floor beam (6m+8m) supporting Z section floor joints above. The segment length under gravity for the beam will be 8m (the longer span) without any lateral restraint for checking negative moment near the support considering...
I am designing rafters to AS4100 and wondering what if I don't use fly brace. I understand that with fly brace it will give you full restraint. But if I don't use fly brace, will the purlin above be considered as lateral restraint for rafter under uplift? If so. can I take the purlin spacing as...
I have some external precast panels that go to the roof level in a two storey warehouse. First floor is concrete deck. To avoid eccentric loads on the external panels and lead to 'oversized' panels (I am using 150mm thickness) from the concrete slab. I want these external panels not to be...
