2011 Oregon Residential Specialty Code

ARCH 132 2011 Oregon Residential Specialty Code Class/Homework Assignment Chapter 5 Floors Name: ______Date: ______

A wood floor meets fire protection requirement if a minimum ______thick sheathing is used. R ______

Blocking in floor systems shall be a minimum of _____ inches thick. R ______

Floor Joists or beams shall have a minimum ______inches bearing on wood and____ inches on concrete R ______

Floor Joists from opposite sides that lap on a center bearing support must lap a minimum _____ inches and be nailed together with a minimum of _____ 10d nails. R ______

Ends of joists supported laterally by solid blocking must be full depth and ___ inches nominal thick. R ______

A (#2) 2 x 12 floor joist, douglas fir-larch, dead load 20 psf, @ 16" O/C spacing will span ____ Table R ______

List the features that determine the span distance for dimensional lumber floor joist ______Table R ______

The ratio of backspan for a cantilever floor joist supporting exterior light frame, bearing wall and roof shall be at least ratio of ______Table R ______Table R 502.5(1) Exterior Bearing Wall, Girder/Header Span tabulated values assume a # _____ grade lumber.

Bridging is required in floor Joist exceeding a nominal _____ x ______inches. These perpendicular lateral supports shall be placed at intervals not exceeding ______feet ______

Framed openings in floors may have a single header and trimmer the same size as the floor joists when the framed opening does not exceed___ feet. R ______

Notches in floor joist are not permitted in the center ______of the joist length. The depth of a floor joist notch shall not exceed the nominal width divided by ______. The width of the notch shall not exceed the end one third of the joist divided by _____. Figure R ______

Beams must be connected to posts by gusset either of the following materials 1. ______2. ______3. ______Figure R ______

The width of post to beam gussets must be equal to or greater than ______Figure R ______

The length of the gusset shall be at least ____ times the width or depth of the beam. Figure R ______

Beams that splice on posts shall have gussets on ______of the beam. Figure R ______

Posts 4' to less than 8' shall have gussets on ______plus a minimum ______diagonal brace placed at _____ degrees to the post and beam. Figure R ______

Holes may drilled in joist up to ______of the actual (nominal) depth. Figure R ______

5 The maximum O/C joist span for /8" plywood subfloor sheathing rated 40/20 is ______inches. Table R ______