Cottage Carport

[sodamo]

I’m drawing up my future carport for my cottage. More than parking cars, the intent is capture rainwater for catchment storage. You can see the 3k gal tank in pic.

Roof will be 26 gauge corrugated steel on 2x4 rafters, no underlay, .5-12 slope. Prefer 8’ headroom on entry, 7ft in rear allowing gutter and tank connection.

Posts will be 4x6, 6’ oc.
Originally I was going with a 12’ span, but the powers that be expressed preference for 24’ clear span, which is what leads me to the TBN well of knowledge.
While I might be able to make the span with beams of either 3x 2x12 or 4x 2x10, I’m not sure. I did find a suitable truss online but was 14” deep, more than I want, preferring to stay 10” if possible.
That lead me to wonder if a 10” truss clad with 1/2 plywood each side might work with the verticals at approx 3’ intervals.
As shown in pic, I need 2 @ 37.5 ft and 3 @ 35 ft.


Here are my rather crude renderings of my carport I have submitted to local manufacturer for Truss work up. This is not a perfect rectangle due to existing structure. That structure would also support non post ends.

I have a height concern at existing lanai roof that likely affect using an open truss, so wondering if achievable using a shorter truss clad with plywood. Probably a name for it, but I don”t know.

So any TBN expertise appreciated. I will follow up with the feedback from the truss manufacturer.

 

[bcp]

Roof will be 26 gauge corrugated steel on 2x4 rafters, no underlay, .5-12 slope.

I built a small one like that. I wish I had plywood under. I can't walk on it to clean off leaves, etc. Not enough slope for water flow to clean it.

Bruce

 

[sodamo]

I built a small one like that. I wish I had plywood under. I can't walk on it to clean off leaves, etc. Not enough slope for water flow to clean it.

Bruce

It could be a challenge. I will put the rafters 16 oc, the purlins 24 oc.
Fortunately we don’t have a lot of leaves to worry about. I would do more pitch but need to be mindful of rear for gutter and tank hookup and thinking too high in front will not look good.

 

[WranglerX]

Look at Versatube structures... Keep it simple, get custom fabricated kit from your design......

VersaTube - DIY Steel Building Kits

Dale

 

[sodamo]

Look at Versatube structures... Keep it simple, get custom fabricated kit from your design......

VersaTube - DIY Steel Building Kits

Dale

Thanks Dale, depending on shipping cost this may be an alternative.

 

[nyone]

With that much span this is a good area to use steel. Fyi no steel roof manufacture says there roofing is good for a 0.5/12. I believe the lowest slope is a PBR panel and it's 2/12.

Even 3 2x12 with plywood in between each won't span 12' here...but I'm in the snow area.

 

[EddieWalker]

If it was me, I would buy two 24 foot gluelam beams. Here in East Texas, I can buy one for $259 from the local lumber yard. It's 14 inches tall. Shop 3-1/8x14-24' Glulam at McCoy's

I would install one beam across the entrance at the height you want it. Then the other in the middle of your carport up higher so that you create a gable type roof. This will take care of all your engineering and simplify the construction. Then install rafters on top of the beam and slope them down to the front entrance and to the back. This will give you a nice slope for catching water. Use gutters on either end to run the water to the tank.

 

[sodamo]

Looks like I’m going a completely different, thanks to Dale and his VersaTube link. Looking at a 31x24x8 carport.

One of my challenges is working around the existing structures. Would have been much easier if they weren’t a concern.

 

[WranglerX]

Looks like I’m going a completely different, thanks to Dale and his VersaTube link. Looking at a 31x24x8 carport.

One of my challenges is working around the existing structures. Would have been much easier if they weren’t a concern.

Just be aware its a giant "tinker toy set" .. Follow instructions.... Or may be get help from someone who assembles KIT type structures...

Dale

 

[sodamo]

Just be aware its a giant "tinker toy set" .. Follow instructions.... Or may be get help from someone who assembles KIT type structures...

Dale

Even worse it will require a couple of on site modifications. One side the legs require height extensions as the base will be lower than other side. The second segment crosses the walkway, so will have to cut out, then those remaining legs will be about 5 inches higher than the 1st 2. My roofing is in 12 ft sheets so has to be cut with the cottage side possibly longer for better gutter. I’ll probably have as much time in the instructions and just looking as the actual construction will take. But all in all, I’m anticipating some physical work savings compared to stick built. Each piece individually handled, most multiple times and all those Simpson ties with all the nails. I would have prepainted all the wood two coats before any assembly and then redone the cuts. Probably just hit the metal cuts with galvanized spray. I do have a bit more prep work regarding the concrete though.
I will have a helper or two

As for tinker toys, pleasant memories. In another thread I talked about building my battery shelves as being akin to a big erector set, but I had to design that one.



All filled up


Except the concrete, looking to be a fun project.

 

[jdaley]

Think about insulating the roof to prevent condensation and the drips that come with it.

 

[sodamo]

Got quote for the trusesses from local company - OUCH!

Ordered 31x24x8 carport from Versatube, ships 1/4/20 so should get it by end of January.

Company has some screwy policies I might have to inquire about. They don’t want web site direct orders to Hawaii so no way to put Hi in your address. Salesman advised me put Ca as I’m having unit shipped from Az factory to Hawaii shipper in LA and I pay the over ocean charges. Not unusual, I’ve actually done this many times, except this time I end up being charged Ca sales tax, more than double what my Hi tax would have been. A bit strange, and technically I probably owe the Hawaii tax.

 

[EddieWalker]

I'm kind of amazed that it's cost effective to buy a kit and have it shipped there for less than building the carport yourself out of lumber.

 

[sodamo]

The price of paradise, Eddie. I was a bit shocked at the cost of the trusses, but just the 6 trusses exceeded cost of the complete carport kit shipped. And that didn’t include the posts, rafters, purlins, simpsons etc. I potentially lose about 24sf useable space, but won’t miss it. Tempted at some point to relook stick built cost if I did posts @ 12ft, but I have a feeling the kit would still be attractive if I considered labor. I’ve almost always built my own stuff from scratch so a mental departure for me. I did build the house from sips and that was interesting.

 

[arizona98tj]

Looks like I知 going a completely different, thanks to Dale and his VersaTube link. Looking at a 31x24x8 carport.

I used a VersaTube carport kit as a woodshed. After retiring, my wife and I moved back to Minnesota and wanted to use wood heat since we have 80 acres and more trees than we could burn in a lifetime. We had the concrete slab poured when we were doing our sidewalks and deck supports. We put the VersaTube kit up ourselves. Their directions are first-rate, in my opinion....very easy to follow.

 

[sodamo]

Very nice.

 

[WranglerX]

Got quote for the trusesses from local company - OUCH!

Ordered 31x24x8 carport from Versatube, ships 1/4/20 so should get it by end of January.

Company has some screwy policies I might have to inquire about. They don’t want web site direct orders to Hawaii so no way to put Hi in your address. Salesman advised me put Ca as I’m having unit shipped from Az factory to Hawaii shipper in LA and I pay the over ocean charges. Not unusual, I’ve actually done this many times, except this time I end up being charged Ca sales tax, more than double what my Hi tax would have been. A bit strange, and technically I probably owe the Hawaii tax.

California is upside down... IT will tax everything and every thing falls under PROP 65 warning (and ban)... Calif needs to vote out ruling party for something more reasonable....

Dale

 

[sodamo]

Closing in with carport prep. 36, 80lb and 6, 60lb bags of Quikcrete. Rented a mixer from HD for 1st day when a neighbor helped with slab. Wheelbarrow mix by self for the smaller areas.

Step painted today and temporarily back in place. Will replace the 4x6 wooden blocks with concrete blocks. Not sure of final length yet.
View attachment 634688
Concrete basically done except the cleanup, then need to work on placement of the carport supports (red line). Setting too close to the cottage and the verticals become obtrusive, too far away and the end post is potentially a problem in tying into number 2, but I will have to modify regardless. Won’t do anything permanent until pieces are in hand (ships Jan 2). Verticals are spaced 5,5,5,5, & 4 ft. Similar to below with 1 more section

View attachment 634690
This last piece of concrete ties in pieces from 4 previous pours over 15 year period:

#1 was part of original construction to give a dry place out of the mud for generator, batteries, washer & dryer, etc.
#2 was for initial solar panel install, just 6 post slanted frame. Latter enclosed and roofed to house washer & dryer, water pump & tank.
#3 was part of driveway pour for walkway.
#4 was this summers driveway expansion.

A very different vision from 2004

 

[Industrial Toys]

That looks like a ton of weight for Dexion, on the Battery rack.

 

[sodamo]

That looks like a ton of weight for Dexion, on the Battery rack.

OK, got me ???