pergola slab design

Old 11-14-13, 09:50 AM
Thread Starter
Join Date: Nov 2013
Location: United States
Posts: 1
Upvotes: 0
Received 0 Upvotes on 0 Posts
Question pergola slab design

My contractor indicates a 4 inch thick reinforced concrete slab will suffice for a standalone 16 x 18 ft pergola in Argyle Texas. My concern is the structural stability. Columns are to be 8 x 8, beams 6 x 8. High wind conditions are typical for this area. Should I insist on concrete footing below the slab. Your advice will be most welcomed. Thanks Ed
Old 11-14-13, 10:50 AM
Banned. Rule And/Or Policy Violation
Join Date: Apr 2013
Location: USA
Posts: 3,860
Upvotes: 0
Received 1 Upvote on 1 Post
I agree with you, you should have footings.
Old 11-14-13, 12:35 PM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,220
Received 1,291 Upvotes on 1,228 Posts
Can't see how the slab would not crack under this, I would want footings as well.
Old 11-15-13, 07:44 PM
BridgeMan45's Avatar
Join Date: Oct 2011
Location: USA
Posts: 2,838
Upvotes: 0
Received 2 Upvotes on 2 Posts
Entire perimeter of slab should be thickened to 8" or even a foot. Reinforcement needs to be done correctly, meaning not just mesh placed on the grade and concrete poured on top of it. I'd use 2 continuous, longitudinal rebar (top and bottom) in the thickened footing, with mesh looped around them from the interior of the slab. And plenty of control joints.

Thread Tools
Search this Thread
Ask a Question
Question Title: