Slab For Shed Help Requested - Building & Construction - DIY Chatroom Home Improvement Forum


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

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 09-22-2010, 09:44 AM   #1
Newbie
 
Join Date: Sep 2010
Posts: 1
Rewards Points: 10
Default

Slab for Shed Help requested


Slab for 20 x 16 shed
I'm building a 20 x 16 shed in southeastern MA and my concrete guy wants to put 4 12" tubes at the 4 corners and then pour the 4" slab and the tubes all at the same time. The heaviest thing that will go in the shed is a small subcompact tractor. The balance will be misc yard care stuff, bikes, tools etc

My questions are:

Are 4 tubes enough? I would think I would want something in the center
In terms of reinforcement he wants to use wire. From everything I've read I'd be better off with rebar - is this overkill or necessary?

Any other tips for making sure my slab is done correctly? I'd prefer to do this only once.

Advertisement

Connor77 is offline   Reply With Quote
Old 09-22-2010, 10:26 AM   #2
Member
 
Join Date: Mar 2010
Posts: 69
Rewards Points: 75
Default

Slab for Shed Help requested


Hi Connor, I don't mean to hijack your thread, but I just started a similar project and I think the questions I'm about to ask will benefit both of us.

My shed will be 18 by 9, built on an existing concrete slab ( an existing dog run that is sloped for runoff, but that is a different topic! ). Plan A is to lag pressure treated 2 x 4's to the edges of the slab, erect the framework with fir stubs, then the first course of horizontal plywood will also be pressure treated.

Here are the questions I am adding to the mix here.

When lagging the base plate to pad, should I put any kind of membrane or sealer under the 2x4's, or just lay them directly on the concrete?

I'm going to put siding on the outside, should the first course of plywood end even with the bottom of the base plate, or should it overlap the concrete a little? If so, how much? Plan A, end it even!

I plan to extend the J channel and starter strips about 1/4 inch below the plywood. Is that sufficient?

Again Connor, hope you don't mind combining our questions!

Advertisement

papageek is offline   Reply With Quote
Old 09-22-2010, 12:43 PM   #3
Civil Engineer
 
Join Date: Mar 2009
Location: Boston
Posts: 4,301
Rewards Points: 2,180
Default

Slab for Shed Help requested


This reply is addressed to Connor only. There have been numerous posts regarding the advantages/disadvantages of rebar, mesh, or no rebar in concrete slabs. I suggest you search the forum and digest the comments, there must be close to a hundred of them by now.

As for the four 12 inch sonotubes, if they are being placed to support vertical posts, that makes sense, however there is no way to know this unless you post a diagram of the proposed framing for your shed. The tubes do absolutely nothing to strengthen the four inch slab, which is supported entirely by the soil placed under it. See previous threads for full discussion about proper preparation of the subgrade under an exterior slab. Therefore, if there are more than four vertical posts in your building, it may make sense to add sonotube footings under the posts, this is something you should discuss either with the architect of the shed, the engineer, the building inspector, or if you have none of the above, you may want to consider hiring one.
Daniel Holzman is offline   Reply With Quote
Reply


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
engineer wood floor @ uneven Slab on grade gtimk4 Flooring 0 03-21-2010 07:29 PM
Concrete slab to foundation work tntgarv Building & Construction 3 02-28-2010 01:23 PM
Pouring Patio Slab and Post Footings Question average_male Building & Construction 17 09-27-2009 02:44 PM
Suggestion for new sidewalk slab flyboy_ont Landscaping & Lawn Care 7 05-22-2009 12:15 PM
Filling hole in carport (concrete slab) chaddihimself Building & Construction 2 08-10-2007 01:50 PM




Top of Page | View New Posts