Ideas on trusses.

[Firebird71]

Need some ideas on style and type of trusses for my shop. 20x32 20 ft wide and 32 foot long. Trusses will be run 20ft wide 10ft walls inside. I want to install a lift at some point . I need to see if I can find a truss design that will give me maximum height inside of my shop. Don't have a snow load really we don't get really harsh winters here. Maybe 3in is about it. The king design is what I'm looking at right now. But didn't know if there is another design that might be better.


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[James-W]

If it were me, I would just make the walls taller and get standard trusses.

I would also get trusses at least 22 feet so that you have at least a foot overhang.

 

[matt_i]

I would look into the scissor truss. A lumberyard will probably have a contact for a truss manufacturer which will provide engineering (as I recall you don't have typical inspections to follow) but you can be assured they the design is correct, then.

The trussco needs some basic information, distance "between the blocks" which is the outer dimension of the top plates, and the roof pitch, and how much overhang you would like. They also need the perpendicular length of the building to know how many trusses to quote. They can give you some options on the "scissor" and the dimensions you can expect inside.

 

[butterlips]

Need some ideas on style and type of trusses for my shop. 20x32 20 ft wide and 32 foot long. Trusses will be run 20ft wide 10ft walls inside. I want to install a lift at some point . I need to see if I can find a truss design that will give me maximum height inside of my shop. Don't have a snow load really we don't get really harsh winters here. Maybe 3in is about it. The king design is what I'm looking at right now. But didn't know if there is another design that might be better.


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I agree with the scissors truss, unless you want to use this area for storage. I did a room that was 17' 4" (that doesn't include overhang) and instead of an 8' ceiling height, I had a bit over 10' after drywalled. You have almost no attic space with a scissors truss so install conduit for anything you may want to add in the future.

 

[butterlips]

I agree on scissors truss, if height is all you are looking for. I used them for a room I built. They were 17'4" (doesn't include overhang - you'll want more than a foot of overhang. A foot makes it hard to get in and paint) Instead of my room having an eight foot high ceiling, it was a bit over 10' after drywall.
However: if you think you might like to use this area for storage, than don't use a scissors truss. Also, there is almost no attic space, so run extra conduits for anything in the future. You should install an attic vent system because of how little air space there is, if you are in a hot climate and depending on type of roofing materials.

 

[Kevin54]

I have a 28' wide garage with scissor trusses setting on top of a 10' wall. The lift I have is a 9000# / 9' lift and I can get my 4wd 2002 Dodge Ram all of the way up so I can work under it. The trusses are 4/12 outside and 2/12 inside.

 

[rburke65]

There are lots of different truss designs. You have to have a local supplier or lumber yard that can help you through this.

 

[RocketScott]

I have a 28' wide garage with scissor trusses setting on top of a 10' wall. The lift I have is a 9000# / 9' lift and I can get my 4wd 2002 Dodge Ram all of the way up so I can work under it. The trusses are 4/12 outside and 2/12 inside.

That is the rule of thumb for scissor trusses.

Half of the outer pitch for the inner pitch. You can calculate what that gets you and then decide if it's enough.

 

[MushCreek]

They do make parallel scissors trusses with the same pitch inside and out.

 

[lakeroadster]

My building is 30' x 44' with 10 ft walls with 5-12 pitch roof. It utilizes 2 ply trusses, the bay with the lift has the trusses spaced 13'-6" apart. Check out my build thread (sig line) for more information.

 

[mike93lx]

My building is 30' x 44' with 10 ft walls with 5-12 pitch roof. It utilizes 2 ply trusses, the bay with the lift has the trusses spaced 13'-6" apart. Check out my build thread (sig line) for more information.

Looks really interesting. What is the snow load like in your area?

 

[wssix99]

You need a scissor truss as 10' walls with a flat ceiling isn't going to make you happy with a lift.

Can you press the 20' dimension out, also? I was in a 20'-ish garage with my Firebird and there was barely enough room to walk around the car. I have a similar size truck as your Dakota and it fit so tight that we had to have a wheel chock in the floor and a laser shooting across the door opening just so we could make sure we shoe-horned the thing in correctly every time.

 

[lakeroadster]

You need a scissor truss as 10' walls with a flat ceiling isn't going to make you happy with a lift.

Scissor trusses won't give as much space as a ridge beam.. or as multi-ply std. trusses designed for wide spans that simply utilize purlins.

My building is 30' x 44' with 10 ft walls with 5-12 pitch roof. It utilizes 2 ply trusses, the bay with the lift has the trusses spaced 13'-6" apart. Check out my build thread (sig line) for more information.

Looks really interesting. What is the snow load like in your area?

Ground Snow Load 43 PSF
Roof Snow Load 31.1 PSF
Allowable Wind Speed 90 MPH
Ultimate Wind Speed 116.2; Risk Cat II

 

[54stude]

Check our vaulted parallel chord trusses.
http://www.lakecountrytruss.ca/index2b99.html?page=prod_trus

 

[kbs2244]

This is how farmers built those 100 year old barns.
Long nails, big hammers, strong arms.

http://bioengr.ag.utk.edu/extension/extpubs/Plans/6410.pdf