I've been trying to develop safe access to roofs of the tanks and vessels on our site. API 650 and 620 have very clera language about minimum live loads for maintenace access. However I have 2 vessels the prints say were designed to the ASME VIII external pressure. I went through ASME VIII...
From your description I am seeing the problem as a metal form being used to cast a swimming pool bottom? If so - Is the pool inside? The steel will expand significantly more than the concrete. Think of a different construction method.
Is the galvanizing gone?
In my experience in a highly...
Couldn't you develop the plate loading from pg 3-155 in 13th edition? I don't see the difference between raised pattern and flat plate.
Also if you know the defelction work with that. pg 3-7 in 13th edition gives formula for max deflection. Even then you might still get complaints that the...
I also found this in a meeting notes post for an update to API 650 in the future. It's for aluminum roofs, but It's the kind of explanation I've been looking for.
G.4.2.5.2 Concentrated Load The roof shall
be designed to support two concentrated
loads 1100 N (250 lbf), each distributed over
two...
Thanks for the help guys.
I understand the tank will in reality support several hefty guys. I've been up on them myself.
I'm looking for the reasoning behind the code so I can cite it in the development of a safe load practice for our maintenance guys.
I think I'll cite both concentrated...
Where did you get the 300 lbs? It would be interesting if that is for an entire roof. One of the codes had broken it further (IBC?) by working in a 200 sqft reference area.
This is for an existing self supporting tank roof. I'm really concerned the uniform loading is based off a 175 lb person...
I am trying to define a safe loading for Maintenance Roof Access to a domed tank.
API 650 3.10.2.1 states that all roofs will have a minimum roof live load of 25 PSF.
IBC also has a minimum roof live load of 24 PSF for Maintenace Access of roofs.
ASCE 7 will allow for a corrleation between...
