Thanks BA. I'll get the appropriate dimensions for the skin and talk to my boss about. Shouldn't the gap area be taken as the most critical section? The skin reinforcement should only increase the capacity if it's taking load too, no? Just logically it should decrease the eccentricity of the...
I was instructed to exclude the skin reinforcement from the section properties. The skin does not bear against the header, there's around 20 mm of separation. For this reason I didn't include it in the cross section.
Thanks for your feedback.
Ahg...
Let me clarify further. To make an actual form it's got 1/4" skin along the whole length and all the member are adequately able to transfer shear. You make a really good point though, I should also check the capacity of that (but have been told it's not going to govern).
The whole bed...
I've attached a quick sketch to this post, sorry for not including enough detail earlier. I'm doing a couple of these beds and this is another with an addition HSS 102x102x9.5 nearer the centroid.
TLHS: I did use 13.8.3, typo. Thanks!
To clarify:
My approach was to combine the moments of...
I am currently designing a self-stressing precast concrete form, also known as a stressing bed. The pre-stressing steel is subjecting the form to ~2300 kN of load at a 90 mm eccentricity above the centroid of reinforcing steel. The form is supported by two W 250 x 33 sections on the bottom and...
