Tractor Shed, Run-in

Farmall 504 · Sep 27, 2019

Can I span 20' with two 2 x 10's strapped to 4 x 6 posts? Would I need 2x6's across the roof or might 2x4's be enough?

Thanks all.

old · Sep 27, 2019

A whole lot depends on where you are. Where I am I could probably get by doing that but if you up north no way the snow load would be to much.

Farmall 504 · Sep 27, 2019

So 2x12's, or I have to have a center post?

grandpa Love · Sep 27, 2019

2-2x12 should be ok.....rows of 4 nails every 16 inches. And maybe some nuts and bolts. How long are your rafters? Tin or shingles? We just built this for my folks.

Central AL. Hardly ever get snow.

old · Sep 27, 2019

A lot depends on how things are built also. Aren't you here in Missouri?? My machine shed has a single 2X12 across a 16 foot span and it was built back in the early 90s. But it also has a 2X12 for the roof truss and sheet metal nail to the 2 of them

ohiojim · Sep 27, 2019

you can prolly do it if you put a 2x4 between the 2x12 at an angle, kinda like a truss. i did that for a garage door header, worked great.

Geo-TH,In · Sep 27, 2019

I would have to ask my county building inspector if he would approve.
I would Also need a building permit.

Farmall 504 · Sep 27, 2019

I'm in Michigan now, so snow load is a concern. Like the look of yours, just don't want that center post on open side if at all possible. But you used 4x4's on yours? With 4x6's, (could even go 6x6's?), and 2x12x20 strapped to both sides, seems like more than enough to my untrained and unskilled eye. Do I need a special beam or steel to span that? Going to use tin roof, or equiv. I could go down to 16x16, instead of 20 across, but I like 20 much more. All input welcomed.

Farmall 504 · Sep 27, 2019

Are you thinking I should do that, or bemoaning that you have to?

Farmall 504 · Sep 27, 2019

or are those 6x6's?

grandpa Love · Sep 27, 2019

On a deck to span 20' the building inspector required 3 2x12's not sure how a flat deck with a load of people translates to snow load but I'm betting it's close....... weight of our 2x10 joist and 2x6 floor was up there! We are adding a metal roof over this deck. Notched posts really help hold the beams up. We are spanning 13 ft.

Farmall 504 · Sep 27, 2019

Gotcha. Thanks much.

ss55 · Sep 27, 2019

New building or modifying an existing building?

Mike M · Sep 27, 2019

Maybe a little of both ?

Mike M · Sep 27, 2019

I have an 18 foot overhead garage door so the opening is 18 feet. I would have to see what size the header is for sure. But it is just 2 of 2 inch boards with a gap 6" in the middle. I'll have to see if they are 10's or 12's ?

BarnyardEngineering · Sep 27, 2019

Are you expecting the rafters to span 20' as well, or will that span be divided up?

I've got 2x4's spaced every 24" on a 4/12 pitch, approximately 10' span, but they're also braced like trusses. I wouldn't want to try to span 20' like that though.

jacksun65 · Sep 27, 2019

On my lean to attached to garage I ran two two x twelves bark side out screwed and glued together. I am in KY so not much of a snow load but have had five trees fall on it when a tornado went by it. Ten years and going strong.

Geo-TH,In · Sep 27, 2019

What I'm saying is check with your building inspector. Building codes vary from where you live. No snow loading to worry about in Florida, however you need hurricane straps even on boat dock roofs.

A few miles form my place in the north a 3 sided shed was blown apart by a straight wind. Our winds are mostly out of the south west. This shed was open on the south. The wind lifted the roof and blew out the back wall. My guessing this shed was built by Bubby without a permit.

I wouldn't build anything without first getting a premit and checking with the building inspector on how he wants it built. YT building codes are worth about what you are paying for them.

I needed to pay $50 to get a permit to demolish a sturcture. I did pay $50, demolished the building, and then got taxes for it the next yar. Had I not jumped throught the hoops, The fine for not getting a permit is very expensive.

Please guys, if you're going to build something build it right the first time.

db4600 · Sep 27, 2019

?Build it right the first time? ? Like loader hung brush cutters? What could possibly go wrong?

Bob Harvey · Sep 27, 2019

If this is a header/beam - no. The rule of 'thumb' is 1" of depth (single) for 1' of length. Even doubled or tripled would not fill that job. Check the engineer specs. The truth is the weight of the beam -at 2x10 - would sag about 2 ". HTH P.S. consider an engineered structural unit.

Geo-TH,In · Sep 28, 2019

I'm not dead yet or even got a scratch.
This will make the YT OSHA histaricals go bananas.

Been using this to prune trees and bushes up to 10 ft off the ground for 10 years now.
No one has been killed or injured.
Nick named this invention BRUSH BUSTER.

No way will I get in front of BUSTER when it's running.

showcrop · Sep 28, 2019

504, my question is: What is "strapped"? whatever you use for a beam it needs to be sitting ON TOP of a part of the post, usually with the top of the post notched as in Grandpa's pic of the deck.

Blackhole49 · Sep 28, 2019

I built this 12'x20' lean to on the back of my house in SE MI as a "temporary" place for my boat and tractor 34 years ago. It is on a 2x12 header with a shingled roof that I put the tin over in 2016. Even doubled up, no way would a 2x12 carry that in a 20'span, even without the snow. While it has been there 34 years, I consider this way under built. My back 13'x48' lean to is set on double 2"x12"s with posts every 8' and 2"x10" rafters 2' apart. It is a little springy walking on it.

rustred · Sep 28, 2019

I would hardly think its enough, going to get sag inbetween posts. but that all depends on your rafters. you using 2x4's or 2x6's? and the spacing on them. plus depends on the roof... tin or shingles? plus how big is this shed? very little info you gave. I am thinking max 15' but not an engineer and going from sheds here.

caterpillar guy · Sep 28, 2019

A lot depends on the material. We have some places we used 20 foot 2x12's for plates then set the rafters on them at 3foot spacing and been there since the early 80's with no sag nor springyness. They are full rough cut planks with the same typs of rafters not trusses just a 2x6 for a rafter. The plates are on each side of the pole. We put a scab plank on the joint with a 5/8th's bolt through the pole and planks. I am looking at putting a single 4x12 in between a couple of 2x10 plates to widen a pole spacing in an older polebarn we have now that needs a pole replaced so I can have a bout a 25 foot opening width.
All lumber here used is Oak,Ash,Elm.
I would not be afraid of doing a 20 foot span with 2x12's in Oak,Ash or the like. I would use one on each side of the pole and bolt it with the scab plank across the joint though. then put some bolts through the scab and the plates. 3/8th's for that would be good through the pole 5/8th's.

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