Presentation on theme: "Grimsby Secondary School TCJ3C"— Presentation transcript:
1 Grimsby Secondary School TCJ3C Floor FramingGrimsby Secondary SchoolTCJ3C
2 BALLOON FRAMINGAn older style of framing in which the studs in the bearing walls are run uninterrupted from the sole plate up to the roof plate.The floor joists are nailed to the studs.Quality of longer materials not as available1 x 4 let into the framing for diagonal bracing.
4 PLATFORM FRAMINGFrame of the building is raised one story at a time with studs that are a single story high.The walls for each story are set over the underlying joists and subfloorFloors are complete and independent of the wallsSubfloor extends to the outside edges of the building.Each level of the house is constructed separately.Build walls on floor and tilt up into place.
6 Floor Frame Members Girders Posts or columns Sill plates Joists Floor frame consists of:GirdersPosts or columnsSill platesJoistsBridgingSubflooring
7 GIRDERS (Beams)Larger principle beam made of steel or wood supported by posts/columns or piers which support the floor joistsCan be recessed into foundation wall ␣ Joists will set on top of girderCan sit on top of foundation wall Joist will hang off side with Joist Hangers
8 GIRDER COLUMNS Girders may be supported by steel columns Column size determined from blueprints
10 Sills Often called Sill plates or Mudsills Usually 2x6 Provide bearing for floor joistsSill is attached with anchor bolts.Size number, and spacing of bolts is determined by OBC.
11 FLOOR JOISTSSeries of parallel support beams which support floor loads and which are supported by Girders, or bearing walls.Solid Dimensional lumber (2x __) ␣Wood I-beamsOpen Web Floor TrussSteel Joists
12 Bridging Joists have a tendency to sway and deflect over long spans Bridging stiffens flooringSolid wood2” X 2 “ diagonal cross bracing