Rafter Supported Roof
Rafter Supported Roof
(OP)
Hi all,
I want to ask that when the roof is a supported cone roof for example having rafters, the rafters are bolted with clips welded to the top shell course. I want to ask if there are calculations made to ensure that the tank wall thickness would be able to withstand the loads imposed on it by the rafters as they are bolted to clips welded to the shell's thin plate??
I want to ask that when the roof is a supported cone roof for example having rafters, the rafters are bolted with clips welded to the top shell course. I want to ask if there are calculations made to ensure that the tank wall thickness would be able to withstand the loads imposed on it by the rafters as they are bolted to clips welded to the shell's thin plate??





RE: Rafter Supported Roof
RE: Rafter Supported Roof
RE: Rafter Supported Roof
Are you actually experiencing failures in that clip area? Or just pondering the possibilities?
One thing I have learned is that there is literally no end to the design and calculations that COULD be done in a given situation. If NASA got hold of that connection, they could put 50 engineers to work on it with FEM and 20 years later, they still wouldn't be done.
The derivation in the Bednar book doesn't seem to be based on thick vessel assumptions. As I mentioned, it seems overly conservative, and I would be interested in another quick approach that gave higher allowable loading.
RE: Rafter Supported Roof
RE: Rafter Supported Roof