For building trusses use 2 4 lumber and make the gussets from plywood.
Proper roof framing.
Gable a gable roof has a ridge at the center and slopes in two directions.
Designing the roof 1.
Draw a ridge line between the intersection points of the hip rafters.
As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes.
Start with a layout of a rectangular shape building.
It is simple in design economical to construct.
Construction accidents occur in the thousands every year.
Choose the design of the roofing trusses.
Depending on the roof design and the roof rafter spacing.
Position the square at the end of the rafter board with the tongue on your left and facing away from you.
If your project had a rafter length of 8 or less a safe and strong method is to use 2x8 framed 16 on center.
A vented attic where insulation is placed on an air sealed attic floor is one of the most underappreciated building assemblies that we have in the history of building science.
Now draw a 45 degree line from each corner toward the centerline that can help to establish location specifications for.
Install baffles providing a minimum of 1 inch of clear space between framing and or under roof decking at eaves to ensure that ceiling or roof insulation does not block ventilation paths.
The framing style of the roof refers to the actual components of each.
Common types of roofs and basic framing terms.
Along the edges and every 12 in.
Understand the different measurements.
If you want to frame a roof you ve got two important choices to make in terms of design.
Choose a style of roof.
Measure form the top of this line down the board to determine the line length or length of the rafter less the ridge.
In high wind areas sheathing along the eaves rakes and ridges is nailed every 6 in.
Whether stepping on a nail twisting when.
Shed roof framing process explained step by step instructions safety first.
So i ll start by saying something that might sound controversial but really isn t.
The american plywood association says there s no reduction in strength for nails overdriven by 1 16in.
Add the length of the overhang beyond this mark and.
Choose the roofing material.
Types of roofs the most commonly used types of pitched roof construction are the gable the hip the intersecting and the shed or lean to.
An example of each is shown in figure 2 1.
Roof sheathing is nailed every 6 in.
For vaulted or cathedral roof construction provide a free ventilation path from eaves to ridge between all rafters.
Building codes such as the icc s 2012 international building code section 2308 10 roof and ceiling framing typically specify that where rafter ties are used they are required at intervals ranging from 12 to 24 o c.
