Sizing overhead beam

[Slackerzinc]

Hey guys
I need help sizing a 25' overhead beam for a beam trolly/hoist on the garage.
I want 1000 pound capacity point load. Would a 8x24 beam be sufficient?
I found this beam locally for a great price. Minimal deflection wanted.
Thanks, Andrew

 

[Slackerzinc]

Yup steel beam 25' long 8x24

 

[2CWG]

DISCLAIMER: I'd recommend having a licensed structural engineer review your installation plans and perform the necessary calculations. Overhead lifts are dangerous and individual installation requirements depend on a wide variety of factors that can't be properly evaluated online

If you're looking for some 'napkin math' for rough sizing then the following resources could help:

Ref for beam properties (choose beam type/size for MoI/MoE and such):
http://www.engineeringtoolbox.com/beams-t_58.html

Ref for deflection under load (plug the properties from the first link into the center-load calculator in the following link):
http://www.engineeringtoolbox.com/beam-stress-deflection-d_1312.html

 

[318fekim]

It all depends on the actual amount of span between attachment points. Osha deflection allowance for said beam is fairly easy to calculate. You are allowed .00166 for every inch of open span.

 

[bob15]

Yup steel beam 25' long 8x24

8"x24" means nothing without knowing what the web and flange thickness is. It could be 1/8-3/16" thick for all we know.....

bob

 

[BD1]

here, check this out, Wallace Gantry info.
http://www.wallacecranes.com/triste1.htm

W8x24 beam is 24 pounds per foot,7.93 depth,.245 web thickness,6.495 flange width, and.400 flange thickness. This is a WIDE FLANGE BEAM

S8x23 beam is 23 pounds per foot, 7.93 depth,.441 web thickness, 4.171
flange width,.425 flange thickness
This is from Ryerson steel book. You could always add a temporary screw jack from slab to bottom of beam if load is questionable.

 

[Slackerzinc]

8"x24" means nothing without knowing what the web and flange thickness is. It could be 1/8-3/16" thick for all we know.....

bob

8x24 actually is all the info you need........

 

[LutzTD]

here, check this out, Wallace Gantry info.
http://www.wallacecranes.com/triste1.htm

W8x24 beam is 24 pounds per foot,7.93 depth,.245 web thickness,6.495 flange width, and.400 flange thickness. This is a WIDE FLANGE BEAM

S8x23 beam is 23 pounds per foot, 7.93 depth,.441 web thickness, 4.171
flange width,.425 flange thickness
This is from Ryerson steel book. You could always add a temporary screw jack from slab to bottom of beam if load is questionable.

2nd that, if your worried keep a temporary post handy, Ive seen guys use way undersized beams for the span and them jam in 4X4 posts while using the hoist which was fairly infrequent. If you "need" to roll the hoist the full length then 2 posts you can swap around the load works too.

 

[Charles (in GA)]

The issue here may not be the beam itself so much as the support for the beam. The beam will be heavy and then adding the load to it, you are not going to just support this with some simple posts to the floor or rest it on the top of a stud wall. It will need some sturdy steel supports, and possibly some heavier footings in the floor.

If it really is a W8x24 then it will weigh 600 lbs. If the OP is describing the dimensions, and not the correct technical description for the beam, then he is probably describing a S24x121 which has a 8.05 inch wide top and bottom flange and stands 24.5 inches high. This beam weighs 121 lbs per foot, for a total of 3,025 lbs and merely getting the beam in place will be a feat, let alone supporting it.

Charles

 

[Slackerzinc]

8" x 24 lbs/ft is the beam. It's 25 feet long. I am supporting it with the same size beam pieces 9 ft long. Base plates, and braced on wall from side movement

 

[BD1]

The issue here may not be the beam itself so much as the support for the beam. The beam will be heavy and then adding the load to it, you are not going to just support this with some simple posts to the floor or rest it on the top of a stud wall. It will need some sturdy steel supports, and possibly some heavier footings in the floor.

If it really is a W8x24 then it will weigh 600 lbs. If the OP is describing the dimensions, and not the correct technical description for the beam, then he is probably describing a S24x121 which has a 8.05 inch wide top and bottom flange and stands 24.5 inches high. This beam weighs 121 lbs per foot, for a total of 3,025 lbs and merely getting the beam in place will be a feat, let alone supporting it.

Charles

Looking at the wallace gantry site that I posted, if he had a S24x121 he would be good for about 10 TONS. Yea, he would have a lot of work ahead of him .

 

[Greg-nwo]

Check out the software tool called Beam Buddy. Let's you run the numbers on different sized beams and spans etc.