Deck post base problem: Do you see where the problem is?

by ken » Tue Aug 29, 2006 11:13 pm

**8/29/06
**Field problem: Deck post base

http://primalkey.com/_blog/img/prob-deck-061606.jpg

by ken » Tue Aug 29, 2006 11:38 pm

The obvious obvious problem is that there is "no" anchorage at the post base to the pier.
A "pin" like solution should be ok and the round pier should be made bigger enough to account for some common post offset issues.

by Bruce Pooley » Sun Sep 03, 2006 3:46 pm

This conc pier and log post will not meet the code requirements!

What are the magnitudes of the loads?

You might want to check the connection of the ledger to the house. Only one lag bolt visible in the photo. I have gotten away from using the lag bolts (or lag screws) since they do not generally provide enough load transfer -- ie. 3/8 inch diameter is only good for approx. 135 lbs. I like to design using the Legerloks that provide almost twice the load capacity and you do not have to predrill the holes.

by ken » Tue Sep 05, 2006 2:43 pm

Agree that the post base anchorage requirement was not met.
The maximum design load was about 2.1 kips at each post.
Obviously, the single 1/2" dia. lag screw will not carry the beam reaction from the side of the log post.

It is always important to know that we need to check the side connection method for the potential rotation from the member caused by the offset from its design loads.