They are attached to the top ends as well as the bottom edges of each truss.
Shed roof gussets.
Once you have verified that they do indeed measure 12 or whatever the width of your shed is you can join the top truss members with a plywood gusset see top picture above.
The thickness of the material used for the gusset also affects the span rating that is how far apart the trusses can be spaced along the roof.
You use the gussets to support and connect your trusses to the shed.
Gussets are necessary to cover the joints of each end of the rafters.
Further make sure you place wood glue on each of the three gussets.
A run of 12 12 is a 45 degree angle.
This can be accomplished with collar ties boards spanning the shed at ceiling height or with large gussets further up the rafter slope.
These gussets are cut from plywood.
How to install roof trusses on a shed.
You can use common rafters on any shed roof but they make the most sense when constructing a gable roof or lean to type shed roof where they can sit on or attach to top plates of a wall.
The rafters are angle cut at the ridge end and notched with a birdsmouth where it meets the top plate of the supporting wall.
A simple gable shed roof is often built using 2 4 or 2 6 lumber for the rafters and 2 4 for the collar ties.
When the glue has already dried turn the truss over and then attach the other three gussets to each of the corners including the top.
We will be going over how to do a king post truss on a shed with a 4 12 roof but it can be done on any type of pitch.
One it s more common than plywood he points out.
Final shed truss assembly place wood glue at the end of the board where they will meet.
A 4 12 roof is around 19 degrees.
Choose the right truss type.
One collar tie would be enough in your case.
When the truss is placed and secured you can now start gluing the parts of the truss as well as nail the gussets to each of the corners.
Many building codes do not allow a roof on a shed to be less than 3 12 as flatter roofs are more prone to leaks and snow damage.
The truss i constructed is shown below with the end of the tape at about 12 which is about where the truss width ended up being.
When it comes to using osb or plywood for gussets vogt says that osb is more commonly used.
I built my 12x10 shed by using 4 by 18 osb gussets at the peak of each 2x4 rafter set essentially resulting in a truss which proved very solid.