PVC conduit run under deck.

Reply

  #1  
Old 02-07-05, 11:36 AM
CRJ
Visiting Guest
Posts: n/a
PVC conduit run under deck.

Hi,

Can PVC conduit be run over the ground if it is underneath a deck instead of burying it? Also, could it run alongside and be attached to the side of a deck?

Thanks!
 
Sponsored Links
  #2  
Old 02-07-05, 01:00 PM
Member
Join Date: May 2001
Location: Dry Side of Washington State
Posts: 738
Received 0 Votes on 0 Posts
Originally Posted by CRJ
Hi,

Can PVC conduit be run over the ground if it is underneath a deck instead of burying it? Also, could it run alongside and be attached to the side of a deck?

Thanks!
What are the dimensions of the deck? What size PVC conduit are you going to use? What's the distance from grade level to the deck.
 
  #3  
Old 02-07-05, 01:05 PM
CRJ
Visiting Guest
Posts: n/a
The deck is about 8'x8'. From grade to bottom of deck joist is 6 to 8 inches. Conduit is schedule 40 PVC 1".
 
  #4  
Old 02-07-05, 02:19 PM
Member
Join Date: May 2001
Location: Dry Side of Washington State
Posts: 738
Received 0 Votes on 0 Posts
Originally Posted by CRJ
The deck is about 8'x8'. From grade to bottom of deck joist is 6 to 8 inches. Conduit is schedule 40 PVC 1".
1" PVC conduit requires being securely fastened and supported every 3 feet. PVC Schedule 40 is thinwall. Schedule 80 is heavy wall.

Where do you live? You may have to use an expansion fitting. Is the PVC conduit run between securely mounted items such as boxes, elbows, or conduit terminations?
 
  #5  
Old 02-07-05, 02:26 PM
Member
Join Date: Sep 2003
Location: Central New York State
Posts: 13,973
Received 0 Votes on 0 Posts
I would use schedule 80 PVC for your application.
 
  #6  
Old 02-07-05, 02:47 PM
Member
Join Date: Sep 2000
Location: United States
Posts: 18,497
Received 0 Votes on 0 Posts
I have PVC conduit attached to the bottom of my deck joists.
 
  #7  
Old 02-07-05, 09:17 PM
CRJ
Visiting Guest
Posts: n/a
This is in the Pacific Northwest, in the general Seattle area. Very mild climate. What are the specs on expansion joints? Is it different for schedule 40 versus 80? I do have them on the 40' - 50' sections that are in the afternoon sun.

This section of the run would go about 8-10 feet under the deck, that would also be the distance of the straight portion. I could fasten it to the undersides of the joists since the deck will get rebuilt. After it emerges from under the deck, it would then be going down into a trench that would be under the yet to be built hot tub slab. Just trying to keep to the most direct route and minimize the ditch digging. Is 24 inches under the slab bottom sufficient? I could easily switch to the schedule 80 as this is section between the GFCI breaker shutoff panel and the stubout for the hottub.

Thanks!
 
  #8  
Old 02-08-05, 09:14 AM
Member
Join Date: Nov 2002
Location: SC
Posts: 171
Received 0 Votes on 0 Posts
I'd attach it to the joists, if its not subject to physical damage sch 40 shuld be fine. In trench under 2" slab, 12" deep, if 4" or greater, 4" deep.
 
  #9  
Old 02-08-05, 11:56 AM
CRJ
Visiting Guest
Posts: n/a
Great news. Thanks to everyone for all the help.
 
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: