1. Sill and Floor Construction
Chapter 11
Sill and Floor Construction

2. Platform Framing One and two story construction Easy Fast
Shrinkage is uniform
Safe – solid surface for construction

3. Platform Framing
Sill Plate – rests on the foundation, the beginning of the wood structure. (2 x 6)
Sill Sealer
Box sill construction
Header
Floor Joists

4. Platform Framing

5. Balloon Framing Older method Wall studs rest directly on sill plate.
Solid / Standard sill
T-Sill
Good Vertical stability
Need for fire stops
Poor work surface during construction

6. Balloon Framing Solid Sill No header Need for fire stops
Joists nailed to wall studs

7. Balloon Framing
T-Sill
Has header
No need for fire stop

8. Balloon Framing

9. Joists and Beams Joists – Provide support for the floor
2 x 6 to 2 x 12
12” , 16” or 24” spacing
Softwood
Size depends on
Length of span
Load to be supported
Species and grade of wood
Spacing (O.C)

10. Wood sizing Nominal vs. Actual 2 x 4 is actually 1½” x 3½”
Chart on page 195

11. Floor Joist Span Data
Page 196

12. Floor Systems Trusses P. 199 Girders Beams
Partition Walls (Parallel Walls)
Cross Bridging P. 198

13. Sub floor
Plywood
Tongue and Groove
Common Boards
OSB

14. Cantilevering

15. Post and Beam Posts support Beams
Load bearing is spread over a greater span
Non load bearing walls
Curtain Walls
Foundations are continuous wall or piers
Beams are Longitudinal vs. Traverse
Perpendicular to the ridge beam
In line with the ridge beam