I’ve been absent here for a little while (about five weeks) as I continue work on the Chicken Palace. I’ve been working on framing a roof, but as always, I sure am slow. You can read the earlier posts in this series here:
I finished up my last blog post with all the walls framed and erected. The next step was designing and then building a bunch of roof trusses. I looked online and found a great tool here http://design.medeek.com/calculator/calculator.pl. This really helped me get a good idea of what I wanted to build, but I had to figure out the dimensions of all the individual parts myself. The coop is under a lot of fir and cedar trees, so pine needles building up on the roof will be a problem if the roof has a shallow pitch. For that reason, I settled on a 10:12 pitch roof. This equates to 40°.
The basic layout of my 10/12 truss.
I modified the design that I found online slightly. I wanted to have a ridge board along the peak of the roof, so built the trusses in such a way that one can drop in later.
Laying out the pieces for my prototype roof truss.
The trusses are made from:
- 1 – 2x4x12 (cut in half to yield both rafter members)
- 1 – 2x4x8 the bottom chord
- 1/3 of a 2x4x10 (each 10 footer yielded 3 king studs)
- 3/8″ ply for the gusset plates
- Construction adhesive, screws, and nails.
I estimated that each truss cost me about $10 to make. I’m guessing that this is way cheaper than ordering trusses.
I made a prototype truss to test and confirm the dimensions, and then spent a few days batching out all the parts. Keep in mind I was doing a few hours each day before going to work, but it took the better part of a week to design and cut out all the parts.
A closer view of how the top of the truss comes together.
I put a scrap off-cut in to simulate the ridge board.
The ridge board will sit directly on top of the king stud.
A whole bunch of rafters ready to be made into trusses.
All of the 8-foot bottom chords.
All the king studs.
Plywood gusset plates for joining the truss parts together.
I realized that I forgot to make plywood gusset plates for the bottom of the king stud, so went back to make these.
OK… ready to get started at last. I gathered all the parts to make the first truss. I used PL375 construction adhesive and screwed then nailed the plywood gusset plates on.
Everything ready to start the assembly.
The plywood plates were glued, screwed, and nailed to the truss members.
My neighbor came over and pointed out that the outer plates would obstruct the 2×4 blocking that I will need to install later. I got out my combo square and then trimmed the plates back with a sash saw.
I realized after the fact, that the plywood plates would get in the way of the blocking when the trusses are installed. I trimmed them back with a sash saw.
The trusses will have plywood plates on both sides, but the first one will serve as a form to build all the other trusses, so no plates on one side for now.
I flipped the truss over and instead of adding the plates on the other side, I added plywood tabs to the edges to make this truss into a form for building the rest of the trusses.
The first completed truss with gusset plates on both sides.
I made 19 trusses and stacked them around the coop. Truss assembly took me about 3-4 days.
Staging the trusses for installation.
The first of the trusses going up.
Lots of rain kept slowing me down. Standing on top of a wet 2×4, eight feet off the ground is no fun. It’s not worth getting hurt just to build this coop, so I had a few days in which I made no progress.
Starting at the other end and working towards the middle.
To make things a little safer, I made a platform to stand on while putting up the trusses.
You can see the platform that I made to stand on while I install the trusses.
Once I had all the trusses up, I finalized the position of the ridge boards and joined them together. The design of the building means that the corner has to be framed manually since no trusses will fit there. I found a picture online that shows what I mean. It’s not my building, and mine forms a 113° “L” not a 90°, so this is just for clarification.
I basically just built a truss in place by first adding a bottom chord, then the hip and valley rafters, then a king stud, and all the plywood gusset plates. This should be very strong.
It was also at about this time that I went all around the chicken run and added 2×4 diagonal bracing at the top of all the wall studs. This should stiffen the building up a little and prevent it racking.
Once all the trusses were installed, I had to manually frame the corner.
How I joined the two ridge boards together.
A close-up of the intersection.
After adding the fill rafters and the king stud:
The hip rafter and fill rafters.
So here, the roof framing is basically done. You can also see the diagonal bracing that was added to the walls. Time to start on the fascia.
With all the roof framing done, I started on the fascia board.
It was tricky getting this stuff up and in place on my own, but eventually I got it. I want to have a small overhang on the ends the roof. A building just doesn’t look right to me without one. To accomplish this, I left the ridge boards and fascia boards long and will fit false rafters to them later.
The ridge board and fascia board are deliberately left long.
Fascia on the other side.
A false rafter is attached to the ridge board and fascia board, creating an overhang.
Here you can better see the overhang created by the false rafter.
All the fascia board installed.
The same overhang is on the other end.
Now we’re getting somewhere!
A better view of the finished framing from the inside.
Before I forgot, I figured I had better remove the platform while I still could.
Removing the platform through the opening in the trusses.
Time to get some OSB sheeting up on the roof. I should point out here that I hate carrying sheeting up a ladder and nailing it to the trusses. It’s probably my least favorite part of building. As such, I didn’t take hardly any pictures of this process. This one will have to do:
The first row of OSB sheeting nailed in place.
Once the sheeting was all nailed down, I was pretty sick of roofing by this point. I installed a metal drip edge all the way around the roof, but again forgot to take pictures. Once the drip edge was installed, I tacked on a layer of 15lb felt tar paper.
I installed OSB sheeting, then drip edge, then 15lb felt paper.
I put drip edge on the eves as well.
I used a metal valley flashing and felt papered over the top.
The next step was to install all the roofing shingles. I purchased 4 square of architectural shingles (400 sq ft) and ended up using all but a few shingles.
Installing the roof shingles.
I added some metal brackets to support a scaffold board later.
I worked halfway up the first side and added some metal brackets. These are only temporary and will hold a scaffold board so that I can more safely work on the upper parts of the roof later.
The first side is done!
After completing the fist side, I started working my way up the other side.
Getting started on the other side.
Once I had shingled all the way to the top on both sides, I added a ridge cap (made out of cut up 3-tab shingles) and a hip cap.
With both sides finished, I installed a ridge cap and took down the scaffold boards.
So here’s the finished roof. Thank god that is over.
I also installed a cap at the hip joint. It is done!!!
I can’t believe that this took me five weeks. At least now I can work with both feet on the ground and I can now get started putting siding on the hen house. Once the OSB is on the walls, I can install the windows and door. I better get moving. Chicks are going to be delivered on October 21st.
Hopefully my next post wont be another month away.
– Jonathan White
