second floor span

[Dave Maxwell]

Since attic trusses are so overpriced. I would like to put a second floor up. I am going with sixteen foot walls. Building is 42x72. What would be the beat support for 42 foot span. Trying to avoid using support beams. Thanks

 

[Al Bundy]

I've seen 40' spans using engineered joists that did not use any support posts. I don't really know what the limitations are though. I would check with your local building inspector. He'll have to sign off on it anyway. If he tells you no, it doesn't really matter if it works or not.

 

[Dave Maxwell]

I will be building it after main building is done. From my understanding what I do to the inside is none of the county business. Might be wrong though. Might just pertain to houses

 

[ForceFed70]

Pretty sure you will need an inspection for anything like that.

By the time you buy proper engineered beams, etc... you may find that an attic truss is very competative price wise and a heck of a lot less time to build.

 

[Al Bundy]

I will be building it after main building is done. From my understanding what I do to the inside is none of the county business. Might be wrong though. Might just pertain to houses

Actually it is very much their business. Without proper permits and inspections you are leaving yourself open to all sorts of liabilities. Most of what they do is only designed for your safety and the safety of others. In extreme cases if they found out you put up an unapproved structure they can make you take it down. Or they will take it down for you and stick you with the bill. There really is no reason not to pull the permits and do it properly.

 

[Dave Maxwell]

Glad I asked. County I did live in. What you did inside was your own business. Like if a put new carpet in mu house or remodeled kitchen and such. Will have to see if they will allow me to put storage in my garage or not. Old garage had stuff stored upstairs. Different county though. Heck I have to have there permission to put a furnace in here. Last place just needed a building permit. electrical and all inside they didn't care about. Non commercial. Going to get pricey looks like. Attic truss adds 16 thousand to price

 

[Dave Maxwell]

Forgot to add. That 16,000 increase also takes it down to a 36 wide. They don't make a 42 wide here

 

[bigdav160]

I don't see you using dimensional lumber for that type of build. So a visit to a truss company will be in order.

And just for the record, we don't require permits or inspections for that type of build neither.

 

[bczygan]

Since attic trusses are so overpriced. I would like to put a second floor up. I am going with sixteen foot walls. Building is 42x72. What would be the beat support for 42 foot span. Trying to avoid using support beams. Thanks

Is the building up or just planned?
What is the structure?
What are your height limitations if this is still in the planning stages?

 

[Dave Maxwell]

Still planning. Just got my variance approved. It is a Morton pole building. Plan to order next week. They are booked till March already. Running out of time.

 

[hockey88fan]

Still planning. Just got my variance approved. It is a Morton pole building. Plan to order next week. They are booked till March already. Running out of time.

Here's the attic truss I went with, could of gone with wood i joists but chose these as the cost was the same and the trusses went up in 2 hrs. My span is 29'. No inspections needed here either, just a $25 building permit and I was good to go.

 

[Dave Maxwell]

If I could get those on a 42. That would be awesome. I really need the 42 width for my setup is what *****

 

[bczygan]

For those kind of clear spans I would think steel would be the material of choice.

 

[hockey88fan]

If I could get those on a 42. That would be awesome. I really need the 42 width for my setup is what *****

I just called a local truss manufacturer and gave him my ideas, at first they didn't think they would be able to span the 29' but their engineers worked on it and came up with this design. Give your local truss company a call, they may be able to come up with something.

 

[K'ledgeBldr]

Weyerhaeuser's I-joist
Calculating at: 40L/25D load @ L/360, their 24" 560D- will clear span 42'-6" @ 16"o/c.