boat lift constructed from I beams
Post Reply   Forum
Posted by: bink

03/21/2006, 23:10:08

Author Profile eMail author Edit

I would like to build a boat lift from steel I beams. I plan on using a 40' beam with a hoist on a travel car. The beam will be cantilevered out over the water 20'. How large of beam do I need to support 3000 lbs? How large if I use a strong back or truss above the beam?







Post Reply | Recommend | Alert Administrator View All   | |

Replies to this message


Re: boat lift constructed from I beams
Re: boat lift constructed from I beams -- bink Post Reply Top of thread Forum
Posted by: swearingen

03/22/2006, 08:12:15

Author Profile eMail author Edit

It looks like a W14x90 will get you there (with a common 4:1 lift factor), but if you brace the beam along it's length adequately, you could reduce that size considerably. You can also reduce it by welding a channel lying flanges down on the top flange of the beam. As for a strong-back, you'll get greater capacity, but it must be properly designed.

I must warn you, this is a large load and a long cantilever. I recommend you contact a local structural engineer to review the details. If it is not properly supported and braced, even a W14x90 won't work. There is also the potential for major damage or fatal injury.








Post Reply | Recommend | Alert Administrator Where am I? Original Top of thread

Powered by Engineers Edge

© Copyright 2000 - 2019, by Engineers Edge, LLC All rights reserved.  Disclaimer