External roof structure erection
External roof structure erection
(OP)
Dear Experts,
I'm designing a storage tank with the following conditions:
DI: 33 m
H: 12 m
Roof type: cone
structure type: External Rafters
My question is about the erection procedure of roof plates (rectangular shape) and the roof structure. what's the method of erection??
Thanks in advance for any help you can provide.
I'm designing a storage tank with the following conditions:
DI: 33 m
H: 12 m
Roof type: cone
structure type: External Rafters
My question is about the erection procedure of roof plates (rectangular shape) and the roof structure. what's the method of erection??
Thanks in advance for any help you can provide.





RE: External roof structure erection
*REALLY smart engineers consult with the chosen tank erection company on design details and erection sequence [ mostly crane location(s) ]. Really smart project managers determine where and how fast the full quantity of water to hydro the finished tank can be obtained - not a trivial excersise.
RE: External roof structure erection
RE: External roof structure erection
1 - Install several rafters and start adding plates to the underside of these rafters
2 - Pre-fab panels with the rafters & roof plates already welded up.
Hopefully, somebody will talk you out of having the roof rafters on the exterior. "When everybody does something one way, there usually is a good reason" Very poor practice to attach roof plates to the rafters. Tanks work best with the rafters holding up the plates, without the plates being welded to the rafters. Makes the roof a membrane that cha flex, makes the rafters a 'structural' item only.
RE: External roof structure erection
RE: External roof structure erection
RE: External roof structure erection
RE: External roof structure erection
RE: External roof structure erection
The tank is a pretty flexible structure. Typically your roof plates are simply laying on the beams and are welded to the outer angle and center post. The beams themselves are typically bolted together via structural bolts to attachment brackets. Having the structural ironwork completed makes it easy for the contractor to simply order pre-cut roof plates and work their way out plate by plate. Any dimensional issues can be fixed on the fly and you will be left with a proven design that works.
RE: External roof structure erection
Really is a nightmare