Engineers Edge
Spreader Bar Design
Post Reply
 
Engineering Forum General
Posted by: John Hill

07/12/2010, 14:12:44

Author Profile
eMail author
Edit

In all Deflection in Beam calculations, I find no case where there is one support in the center and either an evenly distributed load along the full length or equally concentrated loads at each far end, simulating a spreader bar. Can I use the cases where the beam is fixed at one end and the length and load are 1/2 of the totals, as if the remaing halves (length and load) are on the opposite side of the fixed point - as if the fixed point is the centered single lifting eye for the spreader bar and half the length and load is on each side of that lifting eye? Or is there another formula one must use? Thanks, John







Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
View All   | Next |

 
Share |

Replies to this message

: Spreader Bar Design
: Spreader Bar Design -- John Hill
Post Reply
Top of thread
Engineering Forum General
Posted by: CFour

07/22/2010, 23:12:28

Author Profile
eMail author
Edit

Spreader bars are NOT designed with only one "picking point." There should be at least 2 picking points on the spreader otherwise this is a safety hazard.

Spreaders can have (and usually do unless designed for one specific reason) multiple attachments points where the load is connected in order to be used for various objects.

Hope this helps.








Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread |   |
: Spreader Bar Design
: Spreader Bar Design -- John Hill
Post Reply
Top of thread
Engineering Forum General
Posted by: efendy

07/12/2010, 23:03:15

Author Profile
eMail author
Edit

i think this is what you mean. i show you only the first case. the deflection you should be able to find it in engineering text book.

SPREADER_BAR.JPG (32.6 KB)  






Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |
: Spreader Bar Design
: Spreader Bar Design -- John Hill
Post Reply
Top of thread
Engineering Forum General
Posted by: Kelly Bramble

07/12/2010, 19:24:52

Author Profile
eMail author
Edit

You might post a picture of the spreader bar design you are refering to. We can then be sure about the loading configuration you are try to calculate

The load configuration is defined by the static load points. The towing spreader bars I'm familiar with are best represented by a single point loading in the center and load point on the ends.








Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread | |
: : Spreader Bar Design
: : Spreader Bar Design -- Kelly Bramble
Post Reply
Top of thread
Engineering Forum General
Posted by: Pinkerton

07/15/2010, 19:34:02

Author Profile
eMail author
Edit

+1 for Kelly, same for my experience with lifting spreaders.

Dave








Post Reply
Tell a Friend (must be logged in)
Alert Admin About Post
Where am I? Original Top of thread |   |


© Copyright 2000 - 2015, by Engineers Edge, LLC All rights reserved.  Disclaimer