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Would appreciate some help in designing a shed, I would like this shed to be 60 feet wide, 20 feet deep, 8 feet in height at the back, 10 feet in height at the front, the front should also have a overhang of four feet, how would you put on a roof on this shed? How would it be supported? I would like this four foot overhang to be sloped to the ground. This shed has only three sides, two 20 footer, and one 60 footer. I thank you now for your assistance.
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markem... sounds like a pole barn...u gonna build it?..
if yur gonna have it built , check out some of the pole barn guys... they've got that plan in the printer just waitin to give to the building inspector..
*I was planning on building it myself, any suggestions?
*it's gonna be god-awful ugly..set up a grid with poles @ 8'OC around the perimeter and a set of poles at 12' OC running down the middle..your gonna have a center beam breaking the shed into two spans (10+10).. check span tables for your snow load.. and calc. your purlins (beams) and your center beam, and your roof rafter size... your roof pitch is 2 / 20 which i think is 2.4 / 12 so you need to enter te table s with that pitch..your roof ing material is low pitch also... depending on where you are , i would keep the roof at 3/12 minimum.. and a 6/12 pitch for the sloping front (2' drop... 4' run)... how's thta for starters?
*Mark.. always check MY math.. that was 1.2 / 12 pitch..to get a 3/12 pitch u cud drop the back wall to 7' and the fron to 12' and pull your overhang down to 8' with a 12/12 pitch.. my system has been spooky tonite and it crashed , so wen i went to edit that post , the edit button was gone (5 minutes)..joe d is right on.. but u cud look thru plan books and find a 20' deep bldg and then just stretch it to 60' .... the length to depth is going to make it look ugly no matter what you do... it's hard to build things that long and keep them straight and true.. can you break it into 2 buildings?"proceed with haste ..... repent at leisure"
*I have a friend who has a building similar to the one you describe except it is enclosed on all sides with a standard 3'0" door in each end and a rolling door, about 8 ft. wide, on the front face. It is wood framed but like a pole barn, metal skinned and standing seam roof. Rafters are 2x12 spanning 20 feet but I don't remember the spacing. No center of span support. 2x12's are SYP. My span tables show 16" O/C as follows: 20psf LL, 10psf DL=26', 30psf LL, 10psf DL=22'7", 40psf LL, 10psf DL=20'2" and 24" O/C 20psf LL, 10psfDL=21'4". The pitch is so low you hardly need to factor that into your calculations. Of course, it doesn't snow much in Florida, so that's not a factor and the rafters are exposed with insulation in between so that takes the drywall allowance factor out and metal roofing weighs a bunch less than the asphalt shingle (up to two layers) factor. The only problem he has with his shed is that it is so full of s**t that you can't turn around or get from one end to another without a lunch break. And there is no overhang out front. I guess it's not really necessary when you have a wall.
*Mark,Is this http://www.sutherlands.com/loafshed.html sort of what you are thinking about. Your project is easy until you throw in the 4' overhang with the ridge. It is going to be an expensive feature. This is how I would do it. Pole construction. 5 bays 12' wide or 6 bays 10' wide. Trusses at each bay fabricated to give desired roof profile. Perlins sized to load on 2' centers. Angle braces in front. Girts on 3 sides. Sheet metal roof and walls. Consider the prevailing wind in siting the structure.
*I gotta ask...what are u going to put in this shed?20' depth is an awkward dimension....it doesn't leave much room ahead or behind if you are going to park vehicles in it....changing the depth from 20' to 24', should be considered...IMHO
*Why are they called pole buildings, or pole construction?
*because there is no foundation.. the entire structure is supported on the poles.. and the poles ARE the foundation..each one can support a given load, depending on the bearing capacity of the soil, the size of the footing (if any),, the depth of the bury (develops lateral strength) and the size of the pole (typically 4x6, or 6x6 for light pole construction)the poles can also be telephone poles...some of these structures are very big..now .... what are you building this for?inquiring minds want to know.....
*"it's gonna be god-awful ugly.."ditto ditto ditto
*Consider 24'depth if you've got the room. Around here, there is a "standard" 4/12 pitch 24' roof truss that is stocked at every lumberyard and therefore about half the price of all other trusses, even the 20' ones you'd have to custome order.I've only built three pole barns but all three were 24' deep. Mike's right, a pole barn is built on poles sunk right in the ground. here's a picture of one being built to help you picture what we're talking about. Here, we used concrete under and around the bottom of the poles but it isn't always done that way.View Image
*You call it a shed?