Short Anchor Bolts At A Double Sill - Options? - Building & Construction - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Building & Construction


Thread Tools Display Modes
Old 08-05-2008, 05:14 PM   #1
Join Date: May 2008
Posts: 34
Rewards Points: 25

Short anchor bolts at a double sill - options?

My foundation contractor finished installing the new anchor bolts in my existing concrete wall. All of them are approx. 2 - 2 1/2" above the concrete and are too short for the double sill plate I'm about to install. I see two options: either counterbore a hole in the top plate or add a coupler and another 2" length of threaded rod. I've read posts suggesting both ways but is one better than the other?


RolandOG is offline   Reply With Quote
Old 08-05-2008, 05:54 PM   #2
Join Date: Jul 2007
Location: Jacksonville, FL
Posts: 886
Rewards Points: 500

wondering! what you are building that requires a double sill plate?


Big Bob is offline   Reply With Quote
Old 08-05-2008, 06:45 PM   #3
Join Date: May 2008
Posts: 34
Rewards Points: 25

This is for a renovation of an existing house. I need the double sill plate in order to match the existing construction. If I didn't the new floor and the existing floor would be at different heights.
RolandOG is offline   Reply With Quote
Old 08-05-2008, 09:40 PM   #4
Registered User
Termite's Avatar
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000

Unless your project's engineered plan says otherwise, you're only required to anchor the first bottom plate. So, just bore holes in the 2nd plate just wide enough to provide visual access to the nut and washer. I'm assuming you're anchoring the bottom plate, then tilting the wall with the 2nd plate on top of it. If not, just use a socket to get at the nut.

One thing to remember here. The bottom plate is the anchored plate, and therefore your sheathing must be fastened to it. I often see this done just like you're doing it, but people fail to tie the wall to that bottom plate by nailing the sheathing off. Inevitably, the sheathing is nailed to the upper bottom plate, which doesn't tie that wall down.

If for some reason you're required to have two plates (some wind load designs mandate it in some cases), I'd suggest getting some Simpson epoxy and drilling in threaded rod after the fact.
Termite is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Replacing Rotten Sill Plate Material Tester Carpentry 6 03-28-2011 08:08 PM
Replace door sill = Need new door? NNJGUY Carpentry 23 09-01-2009 01:54 PM
repairing rotted sill dwlodyka Building & Construction 4 02-27-2008 07:38 AM
Replacing the Sill on a Double hung Window Marshall Building & Construction 2 03-29-2007 11:18 PM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1