103g: Floor Frames

Question 1

3 main framing styles

Answer 1

1) balloon framing
2) platform framing
3) post and beam

Question 2

Traditional floor frame “border”

Answer 2

Rim joist

Question 3

TFF stairwell opening perpendicular

Answer 3

Header joist

Question 4

Joists hanging over foundation

Answer 4

Cantilever

Question 5

Parallel TFF stairwell joist

Answer 5

Trimmer

Question 6

TFF “Jack” for stairwells

Answer 6

Tail

Question 7

TFF typical spacing

Answer 7

16oc

Question 8

Find joist size donensions when given the OC spacing without bridging and max span where the joists butt into each other on the beam

Answer 8

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

Question 9

Stairwell width is OVER 800mm

Answer 9

Double trimmer

Question 10

Stairwell width is OVER 2000mm

Answer 10

Engineer

Question 11

Stairwell width is OVER 1200mm

Answer 11

Double header

Question 12

Stairwell width is OVER 3200mm

Answer 12

Engineer

Question 13

Non load bearing wall parallel to joists

Answer 13

Support underneath with extra joist or blocking

Question 14

Load bearing wall parallel to joists

Answer 14

Beam or another load bearing wall underneath

Question 15

Typical spacing of toilet flange from plumbing wall

Answer 15

12-1/2” or 310mm

Question 16

Cantilever joist rule when PERPENDICULAR and LOAD BEARING

Answer 16

1 outward cantilever: 6 inward projection

Question 17

Will floor shears help with squeaks?

Answer 17

Yes. Gotta glue and screw

Question 18

Why don’t we usually turn our floor sheats when we install them at weird spaces or cantilevers?

Answer 18

Unsupported T+G edge needs blocking underneath it; extra steps

Question 19

Can you completely suck up floor sheets to each other?

Answer 19

No they’re designed to have a 2mm gap

Question 20

TFF Joist is 200mm deep, can I drill a 100mm hole?

Answer 20

No. Can only drop 1/4 depth sized hole; 50mm largest

Question 21

Can the edge of my hold be drilled 30mm from the edge of my TFF joist?

Answer 21

No. Minimum 50mm

Question 22

Want to drill a 100mm deep notch on my 200mm joist. Yes?

Answer 22

No. Max is 1/3 depth not 1/2.

Question 23

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?

Answer 23

Yes. Squash blocks to counter compression

Question 24

Can I use regular i joists on the foundation walls going parallel to all my other joists?

Answer 24

No. You need either a pony wall, or install squash blocks along that joist

Question 25

My hanger nails aren’t really digging into my joists when…do I need something to fill the space?

Answer 25

Web filler for nails to bite into at joist ends where they sit in hangers

Question 26

I need to laminate two joists together….

Answer 26

Need filler blocks in between for additional support and fastening

Question 27

I need to drill two different holes close together on my i joist. How far apart should I put them?

Answer 27

2x the diameter of the LARGEST hole

Question 28

My boss told me to cut my i joists 1/4” shorter than we need…is that safe?

Answer 28

Yes. It gives wiggle room during installation and still fits bearing requirements of code