How To Draw Floor Framing Plans
FRAMING PLANS prove the size, number, and location of the structural members (steel or forest) in the building framework. Split up framing plans may be drawn for the floors, the walls, and the roof.
The Flooring FRAMING PLAN must specify the sizes and spacing of joists, girders, and columns used to support the floor. Detail drawings must be added, if necessary, to show the methods of anchoring joists and girders to the columns and foundation walls or footings. The flooring framing programme is basically a program view showing the layout of the girders and joists. Figure 10-19 shows the way of presenting floor framing plans. The unbroken double-line symbol indicates joists. Joist symbols are drawn in the position they will occupy in the completed building. Double framing around openings and beneath bathroom fixtures is shown where used. Bridging is also shown by a double-line symbol that runs perpendicularly to the joist. In the figure, the number of rows of cross bridging is controlled by the span of the joist; the rows should not be placed more than 7 or 8 ft apart. Hence, a 14-ft span may demand only i row of bridging, but a 16-ft span needs two rows.
Dimensions demand not be given between joists. Such information is given along with notes. For example, "2" by 8" joists @ 2' 0" O.C." indicates that the joists are to be spaced at intervals of 2 ft 0 in. on centre (O.C.). 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, and girts or plates.
The WALL FRAMING PLANS testify the location and method of framing openings and ceiling heights then that studs and posts can be cutting.
The ROOF FRAMING PLANS show the structure of the rafters used to span the building and support the roof. The size, spacing, roof slope, and all of the details are besides shown in the program. The roof framing programme is drawn in the aforementioned manner equally the floor framing plan; rafters are shown in the aforementioned manner equally joists. Figure 10-xx is an example of a roof framing plan for a woods-frame 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 management and size of steel reinforcing bars, the direction of the span, and the size and thickness of required structural members. Effigy 10-21 shows an case of a structural roof framing with schedules and full general notes included. When preparing framing plans, follow the procedures outlined beneath.
1. For wood-frame construction, trace or transfer the dimensions of the location of the exterior stud wall, and lay out the limits of the roof overhang. Next, lay out the roof framing by locating the ridgeboard first and then all of the required intersecting pieces.
2. When the floor framing plans are required, proceed to transfer dimensions of the foundation walls or footings. Lay out supporting girders and joists in their proper spacing. Notice any bearing wails, stairwells, and other openings when y'all are developing a second-floor framing plan.
3. For physical framing, take a like arroyo. Lay out the dimensions of the bearing walls below the floor (or roof) being framed. Hence, yous will need the foundation programme to draw the starting time-floor framing, and y'all volition demand the first-flooring plan to depict the second-floor framing. Next, add the locations of the beams and columns and the direction of the span and size of the precast concrete or the reinforcing steel for the poured-in-place physical.
Figure 10-19.-Example of a structural floor framing plan for a wood-frame structure.
Effigy 10-21.-Example of a structural roof framing plan for a precast or a bandage-in-place concrete construction.
4. For steel framing, trace off or transfer the dimensions of all of the bearing walls, columns, and beams below the flooring (or roof) being framed. Lay out the steel framing, using the grid system (a mutual setup used in steel framing).
5. Lay out guidelines for dimensions, notes, and labels. Darken in all of the framing and fill in the notes and dimensions. Draw in the section and particular marks. Go over your structural plans checklist and check the dimensions against those traced from the flooring plan.
Source: http://www.tpub.com/engbas/10-14.htm
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