Need help with post size and wall header size for pole barn.

[CTbone]

The carport would be 30 feet wide and 40 feet long. I would like to use some pre made trusses which are 30 feet wide, 1 foot over hands on each side, spaced on 24' centers. They weigh 200 lbs a piece. I plan on using 21 of them.

I also need to be tall enough to fit two 14ft tall by 12ft wide doors when I enclose the carport in a few years.

So, using 10 foot spacing what size post am I going to need, also, would double 2.x12's be sufficient to mount the trusses to?

I am sure I left out some details, please let me know if ti did.

thanks

 

[Chris705]

CT - to be able to offer any ounce of help we'd need to know what part of the country you live in. That would allow us to know what the snow load, wind load, frost depth etc.....then we can begin to calculate the dead load and add live load of the roof to determine the column size and headers required. Otherwise we'd all be guessing.

 

[CTbone]

CT - to be able to offer any ounce of help we'd need to know what part of the country you live in. That would allow us to know what the snow load, wind load, frost depth etc.....then we can begin to calculate the dead load and add live load of the roof to determine the column size and headers required. Otherwise we'd all be guessing.

Sorry Chris, I had a moment there. I left out some important pieces.

South Louisiana. We normally only have 1-2 days where it dips below 32 deg F.
So, frost isn't an issue. The trusses are designed for a 130mph wind load. Which is about 10 mph more than my code calls for. It also being a car port, the city doesn't need engineered or stamped plans, good enough will work, but I also do not want my carport to fly away during the next storm.

Here is a pic of the trusses engineering specs.

 

[DekeT]

Why do people think they can go on a web site forum to get good engineering advice? And by asking, how do they know if the advice is useful or ridiculous? Find someone local that knows what your codes are, expected loads, good source for building materials, and if you need permitting for your intended use and structure.

 

[CTbone]

Why do people think they can go on a web site forum to get good engineering advice? And by asking, how do they know if the advice is useful or ridiculous? Find someone local that knows what your codes are, expected loads, good source for building materials, and if you need permitting for your intended use and structure.

Maybe there are engineers on here.

I know the codes if I were building a regular garage with walls which were bolted and strapped to the foundation. I am not building that though.

Yes I need permitting, I spoke to the city already about that.

 

[383 240z]

I don't know what you need, but here is what I have. My 32x40 uses 6x6's at the corners, 4x6's on the line spaced every 8' 2x10's sandwiched for a header.

The barn, 26x30 uses posts made of 3 laminated 2x6's Spaced no greater than 10' again 2x10's for headers.

 

[kerr]

Ever consider steel trusses ? On 4" square post set in concrete . You could span 10' between trusses and not need center post on trusses . Darn near bet its cheaper than wood and wood bees dont like steel so much . LOL

My carport is 12' bays by 24 ' wide , 36 total ft. long 1-1/2 x 3 tubing on edge for perlin on 4 ' centers to screw steel sheets to . Spans the 12 ' between trusses with no droop .

Gets a little breezy here too , its all still there .

With less use of stell in any structure it brings the cost down compared to wood and , its steel ! Last long time .

Good luck with your build and enjoy it , gotta love some shade when the heater is in full blast mode about july .

 

[mtwaterguy]

My current 40x96x16 pole barn here in Mt has 6x6 posts and trusses at 12'. 100lb snow and 150mph wind. We sit out on a bench that gets wind at times. Commercial girts help tie it all together.

 

[DekeT]

Maybe there are engineers on here.

I know the codes if I were building a regular garage with walls which were bolted and strapped to the foundation. I am not building that though.

Yes I need permitting, I spoke to the city already about that.

There are engineers on this forum. The last thing a qualified licensed engineer will do is post design advice out on a forum.

 

[buddyboy]

draw up what you think you want to do with no concern for making sure it's engineered correctly.

take it to where you'll be getting your permit

ask to talk to the inspector and show him your drawings and ask what if anything needs changed.

build it like he says it should be built

if you do it will pass inspection

good luck

 

[CTbone]

draw up what you think you want to do with no concern for making sure it's engineered correctly.

take it to where you'll be getting your permit

ask to talk to the inspector and show him your drawings and ask what if anything needs changed.

build it like he says it should be built

if you do it will pass inspection

good luck

this is a good idea. I have a line on some 55 foot 12" treated pilings for $150 a stick. I may go that route in stead of wimpy 6x6's. I'll gi with 2x12's as the headers.