Figure 2-8. - Floor framing plan.
span may need only one row of bridging, but a 16-foot span needs two rows.
Dimensions need not be given between joists. Such information is given along with the notes. For example, 2'' x 8'' joists @ 2 ft - 0 in. OC indicates that the joists are to be spaced at intervals of 2 ft 0 in. on center (OC). Lengths may not be indicated in framing plans; the overall building dimensions and the dimensions for each bay or distances between columns or posts provide such data. Notes also identify floor openings, bridging, girts, or plates.
The ROOF FRAMING PLANS show the construction of the railers used to span the building and support the roof. The size, the spacing, the roof slope, and all of the details are also shown in the plan. The roof framing plan is drawn in the same manner as the floor framing plan; rafters are shown in the same manner as joists. Figure 2-9 is an example of a roof framing plan for a wood-framed roof. Roof framing plans in the construction world today are very technical and highly engineered (wind resistance, load-bearing capacity, etc.), and in most "stick frame" construction, pre-fab yards or truss manufacturers (civilian sector) provides your roof system.
As necessary, SECTIONS are used in each of the main divisions of construction drawings to show the types of construction required, the types of materials used, their locations, and the method of assembling the building parts. Although they may be used in each ofContinue Reading