Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

LAG SCREWS

Status
Not open for further replies.
dherna45

dherna45

Structural
Joined
Mar 6, 2017
Messages
19
Location
US
The Lag screws lateral strength on chapter 11 of the NDS from a side plate to a main member say to be based on a penetration of 8D. Does anyone knows how the strength increases if a penetration depth of 16D is used instead.
Thanks
 
Sort by date Sort by votes
Not totally sure but I don't think you get an increase in lateral strength from going beyond the minimum required penetration.

Check out Eng-Tips Forum's Policies here:
faq731-376
 
Upvote 0 Downvote
8d may be all that is needed to develop the shear strength of the screw.

Mike McCann, PE, SE (WA)


 
Upvote 0 Downvote
Shear does not increase with depth, once fixity is achieved. As Mike notes, when you get to a point (8d is reasonable), then there is no further increase.
 
Upvote 0 Downvote
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top