Roof Framing Plan Symbols

A frame roof an a frame structure uses rafters to form its supporting walls.

Roof framing plan symbols.

On a roof plan the symbol preceded by the letters dn is called a slope indicator. The rafters are shown in the same manner as joists with rafters shown spanning the building and supporting the roof. Separate framing plans may be drawn for the floors walls and roof. In a precast or cast in place concrete floor and roof framing a structural plan should indicate with symbols the location of bearing walls beams and columns and the direction and size of steel reinforcing bars the direction of the span and the size and thickness of required structural members.

S 106 roof plan. Main object line hidden or invisible line indicates center line 3 3 4 dimension lines extension lines symbol indicates center line indicates wall suface n. Figure 10 20 is an example of a roof framing plan for a wood frame roof. Figure 2 2 roof framing terms.

Gambrel roof a gambrel roof is patterned somewhat after the gable roof but has two separate slopes. Symbol description sog fw1 concrete slab on grade foundation walls. 2 can be seen on drawing no. Floor plans site plans elevations and other architectural diagrams are generally pretty self explanatory but the devil s often in the details.

Line length is the hyptenuse of the triangle whose. All other framing and construction wall be assumed to be unrestrained. The floor framing plan must specify the sizes and spacing of joists girders and columns used to support the floor. Roof framing supporting a composite slab can be assumed to be restrained.

Roof framing plans for wood frame construction are drawn in the same manner as the floor framing plan. 3 can be seen on drawing no. While the company does not help self builders to find a plot of land or arrange a mortgage it does have its own planning consultant who works with clients to obtain planning permission. It s not always easy to make an educated guess about what a particular abbreviation or symbol might mean.

Indicates dimensions of. Plan symbols 2 a 4 wall section no. Wood framing drawings framing plans show the size number and location of the structural members constituting the building framework. 3 l 5 detail section no.

1 8 pitch is given so 24 x 1 8 equals 3 or unit of rise in inches. Aa a 6 building section a a can be seen on drawing no. If the unit of rise in inches is 3 then the cut is the unit of rise and the unit of run 12 inches or 3 12.