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Steel Building #1330011 Tue Oct 15 2019 04:25 PM
Joined: Mar 2007
Posts: 422
T
TUTS 59 Offline OP
Shop Shark
So my Better Half has given me the green light on building a shop. I finished the slab a few years back and have had a whole list of set backs on the shop. I was pricing the materials to stick build a 28' X 40' shop, seems like a steel building might be a better option. I have worked out of a prefab building before, it always seemed to have issues with condensation and moisture, i beileve a lot of that might have been cured by better ventilation. Being in So. Georgia humidty is always an issue. I don't think I require anything with a great "R" value as it doesent get that cold here very often. Just looking for sound opinions before I spend this much on something I'll use everyday. headscratch


Craig

Come,Bleed or Blister somethings got to give!!!
Q:"What yah runnin"
A:"3/8 drive Black and Decker aquarium pump motor" (the movie HOTROD)

59' Apache 31, long term project (30 years and counting)
Re: Steel Building [Re: TUTS 59] #1330012 Tue Oct 15 2019 04:35 PM
Joined: Apr 2005
Posts: 7,864
Justhorsenround Offline
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
Roof vents might help.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)


"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line" and lock up those on the wrong side of that line.

Re: Steel Building [Re: TUTS 59] #1330016 Tue Oct 15 2019 05:12 PM
Joined: Jul 2000
Posts: 736
G
Gord&Fran Offline
Shop Shark
Local building codes should specify amount of ventilation required. Ask the building inspector - you pay their salary - they are there to serve the public.


Gord
----
1954 1/2 ton 235 4 speed
"I am not the kind of person who gets things done yesterday. I get them done when I feel like it. Often I do not get them done at all" - Joe Queenan
Re: Steel Building [Re: TUTS 59] #1330023 Tue Oct 15 2019 05:57 PM
Joined: Nov 2004
Posts: 1,540
J
J Lucas Offline
Shop Shark
Here is what I did. I designed my own building (40 by 42') and used 2 steel trusses from this company. https://www.facebook.com/PERKABUILDINGS I also purchased 1/4" thick foil backed foam from the same company to install under the metal siding. I have no condensation problems at all. What really surprised me was how well that thin (1/4" thick) insulation keeps it cool from the sun rays in the summer. Yes, when it's hot it's hot, but nowhere near like a typical metal building.

One picture in my Flicker photos shows the building as we framed it.

Good luck

John


J Lucas





1941 Chevy 1/2-Ton
1942 Chevy 1.5-Ton SWB
1959 Chevy Apache 31 Fleetside
1959 Chevy Apache 32 Fleetside
1959 Chevy Viking 40

My Flicker Photos!

Re: Steel Building [Re: TUTS 59] #1330024 Tue Oct 15 2019 06:02 PM
Joined: May 2015
Posts: 1,555
K
klhansen Offline
Shop Shark
Building code ventilation depends on the building use. For a shop where you're going to work on carbs, etc, where gasoline fumes might occur, higher ventilation rates are required. For condensation, it's a matter of keeping the inside surface temperature above dew point temperature when it's colder outside than inside.
I know that doesn't make much sense, but I can check the code books later in the day and give you a recommendation.
Going from memory, typically, 1/2 air change per hour would take care of it. If building volume is 13440 CF (that assumes a 12' ceiling height for your footprint), a fan capable of 120 CFM (a bit bigger than a bathroom fart fan) would get that air change rate. Turbine roof vents like Martin suggested would do the trick as well. You also have to have somewhere to let air in (try sucking air out of a bottle).


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos
Re: Steel Building [Re: TUTS 59] #1330050 Tue Oct 15 2019 09:46 PM
Joined: May 2015
Posts: 1,555
K
klhansen Offline
Shop Shark
2012 International Mechanical Code (your area may use a different code, but they're usually similar) requires 3/4 CFM per square foot of floor area which works out to 840 CFM for your footprint. That's still not a huge fan. A 12" propeller fan with 1/4 hp motor will put out that much air. You can probably buy one for less than $200.

Last edited by klhansen; Tue Oct 15 2019 09:47 PM.

Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos
Re: Steel Building [Re: TUTS 59] #1330070 Wed Oct 16 2019 12:35 AM
Joined: Nov 2004
Posts: 1,540
J
J Lucas Offline
Shop Shark
That makes sense as my building has continuous soffit vents both front and back following the gables and additional vents (3 per side) in the eaves.

John


J Lucas





1941 Chevy 1/2-Ton
1942 Chevy 1.5-Ton SWB
1959 Chevy Apache 31 Fleetside
1959 Chevy Apache 32 Fleetside
1959 Chevy Viking 40

My Flicker Photos!

Re: Steel Building [Re: TUTS 59] #1330223 Thu Oct 17 2019 11:16 AM
Joined: Mar 2007
Posts: 422
T
TUTS 59 Offline OP
Shop Shark
Just looking for some Pros and Cons with a steel building verses a stick built. I had planned on building the shop myself, doing 2 courses of block as the sill to give me a little more height. The steel buildings are available in 12 thru 14 feet, this is would help if I were to add a lift later. The key point is that I would like a shop without any center posts, a 30ft stick built truss is pushing things a bit I think. Any thoughts?


Craig

Come,Bleed or Blister somethings got to give!!!
Q:"What yah runnin"
A:"3/8 drive Black and Decker aquarium pump motor" (the movie HOTROD)

59' Apache 31, long term project (30 years and counting)
Re: Steel Building [Re: TUTS 59] #1330231 Thu Oct 17 2019 12:58 PM
Joined: Jun 2015
Posts: 52
G
Gooberdog Offline
Wrench Fetcher
I built my 40x100 barn with 40' trusses with 2' overhangs on 8 ' centers. Truss companies know how to make long trusses.
Chuck

Re: Steel Building [Re: TUTS 59] #1330232 Thu Oct 17 2019 01:46 PM
Joined: May 2006
Posts: 667
T
tom moore Offline
Shop Shark
I stick built my small shop - with clear span prefab trusses. Its 26 wide.

Truss company can build any width of truss you need. Consider partial ceiling area with scissor trusses for more headroom and partial ceiling area with attic trusses for storage. That way you do not need to elevate the building - scissor trusses can provide higher ceiling heights.

Could have gone wider, but nosy neighbor up the road - and having nothing to do with adjacent landowner was watching the setback, that in time became a non-issue as I acquired more land along that property line from the owner. We had a handshake agreement when I built the building that it was ok to move 5 feet further into the setback. But nosy neighbor threatened to tell the Town.

26 is not wide enough. 28 is better

Last edited by tom moore; Thu Oct 17 2019 01:48 PM.
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