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Floor Framing Grimsby Secondary School. Floor Framing Design Factors affecting Design of Floor System: Load (weight of material) Size of members Spacing.

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Presentation on theme: "Floor Framing Grimsby Secondary School. Floor Framing Design Factors affecting Design of Floor System: Load (weight of material) Size of members Spacing."— Presentation transcript:

1 Floor Framing Grimsby Secondary School

2 Floor Framing Design Factors affecting Design of Floor System: Load (weight of material) Size of members Spacing of joists Beams or bearing walls Stress Design Criteria (How joists are sized for proper span) Deflection

3 Floor frame consists of * Girders (Beams) * Posts or columns * Sill plates * Joists * Bridging * Subflooring

4 Floor Framing

5 GIRDERS Larger principle beam made of steel or wood supported by posts/columns or piers which support the floor joists Can be recessed into foundation wall Joists will set on top of girder Can sit on top of foundation wall Joist will hang off side with Joist Hangers

6 JOISTS SITTING ON GIRDER

7 RECESSED GIRDER

8

9 JOISTS HANGING FROM GIRDER

10 GIRDER COLUMN

11 Types of Girders (Beams) Solid lumber Glue-laminated (GluLam) Composite beams Parallam (PSL) Micro-Lam (LVL) Steel I-Beams

12 LVL - Laminate Veneer Lumber

13 PSL - Parallel Strand Lumber

14 Steel I-Beam Girder

15 Sills Often called Sill plates or Mudsills Provide bearing for floor joists Sill is attached with anchor bolts. Spacing of bolts is determined by OBC Ontario Building Code

16 SILL PLACEMENT

17 SILL IS FLUSH WITH GIRDER

18 FLOOR JOISTS Series of parallel support beams which support floor loads and which are supported by Girders, or bearing walls. Types Solid Dimensional lumber (2x __) Wood I-beams Open Web Floor Truss Steel Joists Structural Insulated Panels (SIP)

19 DIMENSIONAL LUMBER

20

21 CANTILEVERED JOISTS

22 WOOD I-BEAMS Structural, load-carrying I-joists used in residential and light commercial construction. Composition The flange material for I-joists is typically dimension lumber or laminated veneer lumber (LVL) The web is plywood or OSB. The "I" configuration provides high bending strength and stiffness characteristics.

23 WOOD I-JOISTS

24 STEEL FLOOR JOISTS

25 Open Web Joists

26 FLOOR JOIST LAYOUT

27

28

29 RIM JOIST

30 Bridging Dimensional Lumber Joists have a tendency to sway and deflect over long spans Bridging stiffens flooring Types: Solid Horizontal bridging Cross bridging Span greater than 10' have at least 1 row Span greater than 14-16' have 2 rows of bridging, 5-8 feet apart

31 CROSS BRIDGING

32 SUBFLOORING

33 Thanks for watching


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