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Chapter 11

Chapter 11. Sill and Floor Construction. Platform Framing. One and two story construction Easy Fast Shrinkage is uniform Safe – solid surface for construction. Platform Framing. Sill Plate – rests on the foundation, the beginning of the wood structure. (2 x 6) Sill Sealer

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Chapter 11

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  1. 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” • 1 x 6 is actually ¾“ x 5½” • 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

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