Sill plate

Aboard attached to the top of the foundation wall, typically with anchor bolts, either 2x4 or 2x6

Header/rim joist

Nailed to the top of the sill plate at the exterior edge

Joist

Horizontal beams that support the floor

where do end of joist rest

end of the joist rests on the sill plate and is nailed to the header

How faar do joist span

They span from the sill plate to an interior wall or beam and are normally spaced 12" to 16"

Lumber sizes for joist framing

Lumber sizes for joists are 2x8, 2x10, and 2x12

Subfloor

covers the joist and is typically plywood

what fastens subfloor

The subfloor is fastened to the joists with nails or screws, and construction adhesives are often used to strengthen the floor system.

Double header

Used at an opening that disrupts the framing pattern

How is double header installed

double header is installed perpendicular to the joist; the same size member that is used for the joist is used for the header

double trimmer

Two joists nailed together next to an opening

Tail joist

Normally runs between the double header and sill plate

Ledger

Small piece of lumber nailed to the side of a double header at the bottom of the edge. This piece serves as a ledge on which each tail joist rests

Bridging

Small member between joists to provide lateral support and help transmit the load between the joists

Cantilevered floors

The floor joists are extended out beyond the support, and the joists carry the loads back to the sill plate and foundation

Floor framing dimensions

Shown on the floor framing plan, typically member sizes are designated as 2x10 or 2x12, and member spacing as on center 12" OC or 16" OC

Wall dimensioning

Check to verify the dimensioning practice

Exterior walls dimensions

dimensions normally given to outside edge of studs

Interiror wall dimensions

normally given to the edges of the studs

Diemnsioning notes

The dimensioning protocol to be used is usually shown in the general notes. Always read the general notes before reading drawings

Floor joist member materials

Solid wood joists in 2x sises most common

where does wood joist span

From the outside wall to the interior support walls or beams

Most common floor joist walls sizes

Common sizes are 2x8, 2x10, and 2x12 amd 2x6 is used for short spans