Platform ConstructionPlatform Construction

ConstructionConstruction

Mr. OMr. O

Platform ConstructionPlatform Construction

For use in construction jobs where a house is For use in construction jobs where a house is built over a basement or crawl space.built over a basement or crawl space.

Floor SillsFloor Sills

Sills lie on top of foundationSills lie on top of foundation Bolted in placeBolted in place Insulation between sill and foundationInsulation between sill and foundation

Floor JoistsFloor Joists

2x10 or 12s’ set on edges (vertical)2x10 or 12s’ set on edges (vertical) Rest on floor sillsRest on floor sills Outside joists called stringersOutside joists called stringers Perpendicular joists Perpendicular joists

called Headerscalled Headers

• Nailed in placeNailed in place• MFG’d called I-JoistsMFG’d called I-Joists

Floor Joists (Cont’d)Floor Joists (Cont’d)

Long lengths require doubling upLong lengths require doubling up Support at meeting points and stress points Support at meeting points and stress points

from girdersfrom girders Girders held by Girders held by

columns/postscolumns/posts

Joist SpacingJoist Spacing

12” or 16” O.C.12” or 16” O.C. Why not 24”?Why not 24”? CompensateCompensate

for staircasesfor staircases

Platform ConstructionPlatform Construction

Provides nailing base for subfloor and wallsProvides nailing base for subfloor and walls Repeat for each story builtRepeat for each story built Walls become load bearing rather than Walls become load bearing rather than

foundationfoundation