Rudi McAnichal
Member
- Messages
- 424
Am I right in thinking that those quickly erected buildings have cold-rolled steel frames? Nothing wrong with a cold-rolled frame if used exactly as the designer intended, and correctly specified for local wind and snow loads (Outer Hebrides could be quite windy).
Is the shed liable to sustain accidental damage? Old style hot-rolled portal frames can often tolerate quite a lot of abuse. Touch a stanchion while manoeuvring a vehicle and the result will probably be dented bodywork. Do the same with a lightweight cold-rolled fame and you may distort the entire shed.
Look at the eaves haunch and apex haunch in the photo posted by addjunkie. Solid construction, minimal intrusion into the shed space, unlikely to be hit when shifting something with a fork lift. Compare with the corresponding parts of the cold-rolled frames (slender connecting pieces intruding much further into the shed) and consider whether your activities would put those components would at risk.
Is the shed liable to sustain accidental damage? Old style hot-rolled portal frames can often tolerate quite a lot of abuse. Touch a stanchion while manoeuvring a vehicle and the result will probably be dented bodywork. Do the same with a lightweight cold-rolled fame and you may distort the entire shed.
Look at the eaves haunch and apex haunch in the photo posted by addjunkie. Solid construction, minimal intrusion into the shed space, unlikely to be hit when shifting something with a fork lift. Compare with the corresponding parts of the cold-rolled frames (slender connecting pieces intruding much further into the shed) and consider whether your activities would put those components would at risk.
