103g: Floor Frames Flashcards
3 main framing styles
1) balloon framing
2) platform framing
3) post and beam
Traditional floor frame “border”
Rim joist
TFF stairwell opening perpendicular
Header joist
Joists hanging over foundation
Cantilever
Parallel TFF stairwell joist
Trimmer
TFF “Jack” for stairwells
Tail
TFF typical spacing
16oc
Find joist size donensions when given the OC spacing without bridging and max span where the joists butt into each other on the beam
Use table to find spacing, go DOWN to max CLEAR span that’s equal to or greater than your calculated span, go over LEFT COLUMN to find joist dimensions
Stairwell width is OVER 800mm
Double trimmer
Stairwell width is OVER 2000mm
Engineer
Stairwell width is OVER 1200mm
Double header
Stairwell width is OVER 3200mm
Engineer
Non load bearing wall parallel to joists
Support underneath with extra joist or blocking
Load bearing wall parallel to joists
Beam or another load bearing wall underneath
Typical spacing of toilet flange from plumbing wall
12-1/2” or 310mm
Cantilever joist rule when PERPENDICULAR and LOAD BEARING
1 outward cantilever: 6 inward projection
Will floor shears help with squeaks?
Yes. Gotta glue and screw
Why don’t we usually turn our floor sheats when we install them at weird spaces or cantilevers?
Unsupported T+G edge needs blocking underneath it; extra steps
Can you completely suck up floor sheets to each other?
No they’re designed to have a 2mm gap
TFF Joist is 200mm deep, can I drill a 100mm hole?
No. Can only drop 1/4 depth sized hole; 50mm largest
Can the edge of my hold be drilled 30mm from the edge of my TFF joist?
No. Minimum 50mm
Want to drill a 100mm deep notch on my 200mm joist. Yes?
No. Max is 1/3 depth not 1/2.
I’m anticipating a really heavy tv stand by the exterior wall in my living room…do I need something additional to my i joists?
Yes. Squash blocks to counter compression
Can I use regular i joists on the foundation walls going parallel to all my other joists?
No. You need either a pony wall, or install squash blocks along that joist
My hanger nails aren’t really digging into my joists when…do I need something to fill the space?
Web filler for nails to bite into at joist ends where they sit in hangers
I need to laminate two joists together….
Need filler blocks in between for additional support and fastening
I need to drill two different holes close together on my i joist. How far apart should I put them?
2x the diameter of the LARGEST hole
My boss told me to cut my i joists 1/4” shorter than we need…is that safe?
Yes. It gives wiggle room during installation and still fits bearing requirements of code
