The top of the elevator shaft is not pre buried hook, and now to add channel, in the channel to do hook, elevator Ii Michihiro 2500, asking the hook bearing 3 tons, the need for large channel, detailed explanation
2 28 channel steel or 2 25 steel
To use, use I-beam, after all, span 2500, a little wide, want to save costs on top punching wire rope, anyway, hook is installation or maintenance temporary use, not long-term stress
What is the midpoint moment by channel loadGood 30# I-beam, made of fish bellied beam
