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View Full Version : Single shear for steering rack?


GMracer
01-23-2010, 08:11 PM
Here is a CAD drawing I'm working on, basically the upper tabs will be were the rack will mount to. Two 5/8" bolts going into the rack, the material will be 3/16" and have a second circle piece 3/16" So a total of 3/8" of steel the rack will be bolted against. I could work a double shear into it, but this I feel is substantial enough and is a cleaner approach. Just looking for you guys opinion.

http://i83.photobucket.com/albums/j312/GMracer313/CAD/cad3.jpg

This is the rack I'm using, stock silverado rack. for the record.
http://i83.photobucket.com/albums/j312/GMracer313/Silverado/Complete%20Resto/HPIM0610.jpg

Blake Foster
01-24-2010, 09:37 AM
the factory mounted them in single shear......... i guess you could build a bracket to stabalize the front and make it double shear.

GMracer
01-24-2010, 11:29 AM
yea, that's why I didn't see it an issue. I still don't feel it will be, but I may build a bolt in k member to connect front and crossmembers, that would integrate the LCA bolts.

B_Alley
01-24-2010, 05:59 PM
You should be good- a typical Grade 8 - 5/8" Bolt can take over 8500 lbs in single shear, and you've got to of them. I could run through the math and tell you how high a safety factor that is, but I'm too busy watching the game! :D

GMracer
01-24-2010, 07:09 PM
Cool, I plan on running Hi Strength stainless 5/8" anyway. With the doubled up 3/16" I didn't for see a problem, but thanks for the feedback.