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PowerPoint ® Presentation Unit 44 Ceiling Framing Ceiling Joists Laying Out Ceiling Frames Constructing Ceiling Frames Attic Scuttles Constructing Flat.

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Presentation on theme: "PowerPoint ® Presentation Unit 44 Ceiling Framing Ceiling Joists Laying Out Ceiling Frames Constructing Ceiling Frames Attic Scuttles Constructing Flat."— Presentation transcript:

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2 PowerPoint ® Presentation Unit 44 Ceiling Framing Ceiling Joists Laying Out Ceiling Frames Constructing Ceiling Frames Attic Scuttles Constructing Flat Roof Ceilings

3 Unit 44 — Ceiling Framing A ceiling frame ties together the exterior walls and resists the outward pressure of roof rafters.

4 Unit 44 — Ceiling Framing Ceiling joist size is based on the amount of weight the joist must carry and the joist span. For example, No. 1 2 × 6 Douglas fir joists spaced 24″ OC can span up to 14′-5″.

5 Unit 44 — Ceiling Framing When ceiling joists butt over a partition, an 18 ga  18  long metal strap can be used to tie the joists together.

6 Unit 44 — Ceiling Framing Whenever possible, ceiling joists should be nailed to rafters.

7 Unit 44 — Ceiling Framing When ceiling joists do not run parallel to the roof rafters, 2 × 4s can be used as a tie between exterior walls.

8 Unit 44 — Ceiling Framing Stub joists may be required where rafters do not run parallel to ceiling joists.

9 Unit 44 — Ceiling Framing A 1 × 4 ribband nailed at the center of the joist spans prevents twisting and bowing of the joists.

10 Unit 44 — Ceiling Framing A strongback provides central support for the joist span.

11 Unit 44 — Ceiling Framing When studs and ceiling joists are spaced 16  OC, the joists rest directly over the studs. When studs are spaced 16  OC and ceiling joists are spaced 24  OC, every other joist will align with the studs below.

12 Unit 44 — Ceiling Framing A ceiling frame is constructed over walls that have been straightened and properly braced. In this example, joists lap over an interior bearing partition.

13 Unit 44 — Ceiling Framing A ledger board is nailed against the wall to provide a nailing surface for lower ceiling joists.

14 Unit 44 — Ceiling Framing Backing is nailed to the top plates to provide a nailing surface for the edges of the finish ceiling material. Backing may be 2 × 6s or 2 × 8s.

15 Unit 44 — Ceiling Framing Backing is sometimes nailed on top of bearing partitions.

16 Unit 44 — Ceiling Framing Blocks and backing are installed between joists to secure tops of walls running parallel to ceiling joists.

17 Unit 44 — Ceiling Framing For flat roofs, rafters serve as a base for the roof and as ceiling joists. Since joists for a flat roof must support the combined load of the ceiling and roof materials, 2 × 10s or larger framing members are used.

18 Unit 44 — Ceiling Framing A flat roof must have a small amount of pitch for proper water drainage.

19 Unit 44 — Ceiling Framing Parapets can be framed over top plates.

20 Unit 44 — Ceiling Framing Parapets can be framed into exterior walls.


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