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Electric Cable Hoist - Power Fist with bridge and 21 ft of track C$200
- Thread starter johnnielsen
- Start date
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calgaryguy
Chris
Interesting.
I think its worth pointing out that most garage/home engineered trusses or upper floor wood I-beams are not meant to have weight of this kind suspended from under them. Maybe 200-300 lbs of garage door+track at most.
I'd certainly be investigating what kind of structure I'd need in place to hang not only a few hundred pounds of track and cable hoist from, but also an additonal hanging load the cable hoist might be able to lift.
I think its worth pointing out that most garage/home engineered trusses or upper floor wood I-beams are not meant to have weight of this kind suspended from under them. Maybe 200-300 lbs of garage door+track at most.
I'd certainly be investigating what kind of structure I'd need in place to hang not only a few hundred pounds of track and cable hoist from, but also an additonal hanging load the cable hoist might be able to lift.
Dabbler
ersatz engineer
From a design point of view, the structure above that crane has to be reinforced. The weakness of any truss system is in its connections.
If he had his trusses designed with the crane in mind, then putting below random roof trusses will not be as strong.
I've been building one of these, but the winter slowed me down quite a bit, and then the accident, etc...
If he had his trusses designed with the crane in mind, then putting below random roof trusses will not be as strong.
I've been building one of these, but the winter slowed me down quite a bit, and then the accident, etc...
calgaryguy
Chris
I'm not a structural engineer, but have worked with enough of them (commercials and residential) on various projects to have a vague idea of whats entailed.
Engineered roof trusses, assuming thats what the linked hoist+track are hanging under, are only designed to take large loads from above. Like snow loading or dead loads of sheeting plus shingles. Hanging dead loads on the bottom chord of a typical roof truss are intended to be ceiling drywall and the weight of insulation above. Theres obviously some 'wiggle room' as garage door tracks and the garage door itself (when opened) are also capable of being safely carried by typical roof trusses.
100% agreed. If the structure above was designed to support dead/live loads hanging from below, more than your typical garage door weights, then all is good.
Engineered roof trusses, assuming thats what the linked hoist+track are hanging under, are only designed to take large loads from above. Like snow loading or dead loads of sheeting plus shingles. Hanging dead loads on the bottom chord of a typical roof truss are intended to be ceiling drywall and the weight of insulation above. Theres obviously some 'wiggle room' as garage door tracks and the garage door itself (when opened) are also capable of being safely carried by typical roof trusses.