Residential Floor Frames

Question 1

The main disadvantage of platform framing system is the potential for ____ at every floor level.

Answer 1

Shrinkage

Question 2

Bridging or strapping placement needed when joist span greater than _____ m.

Answer 2

2.1 m

Question 3

All solid wood joists require ____ minimum end bearing.

Answer 3

38 mm

Question 4

The maximum projection of joists beyond a beam is ______.

Answer 4

150 mm

Question 5

Joist hangers are required by code for double header joists supported by double trimmer joists. T or F

Answer 5

False

Question 6

When are double trimmers required around an opening?

Answer 6

When the header is 800 mm +

Question 7

When are double headers required around an opening?

Answer 7

1.2 m

Question 8

Name two framing styles other than platform framing.

Answer 8

Balloon and Post-and-Beam

Question 9

If a non load bearing wall runs parallel to the main joists, what must be installed below it?

Answer 9

A beam or load bearing wall

Question 10

The required clearance between a floor joist and a masonry chimney that is within the building walls is _____ mm.

Answer 10

50 mm

Question 11

Fireplace clearance to combustion material - interior: _____ mm. Exterior: _____ mm.

Answer 11

Interior: 100 mm (4”)
Exterior: 50 mm (2”

Question 12

Greatest concern for wood floor system?

Answer 12

Shrinkage

Question 13

Minimum joist bearing?

Answer 13

38 mm

Question 14

Minimum beam bearing ____?

Answer 14

89 mm

Question 15

For a plumbing wall, blocking should be ______ o.c. Maximum.

Answer 15

1.2 m

Question 16

2x8 floor joists only supporting roof loads can be cantilevered ____ mm beyond their support.
However, 2x10 joists can be cantilevered ____ beyond their support.

Answer 16

400 mm

600m

Question 17

Cantilever ratio back to double header is?

Answer 17

1:6

Question 18

What is balloon framing?

What are the advantages?

Answer 18

The wall studs are continuous from the sill plate on foundation to the top of the wall at the roof

Little or no shrinkage

Question 19

When joists are lapped on a beam the maximum recommended length of lap is _____ mm.

Answer 19

300 mm

Question 20

The sill system requires a minimum of 2x4 lumber for the sill. T or F

Answer 20

T

Question 21

If header joist exceeds _____mm, an engineers design is required.

Answer 21

3200 mm

Question 22

If load bearing walls to right angle of joists only support roof and ceiling loads then they should be located no more than ____ from the joist support.

Answer 22

900 mm

Question 23

Joist restraint must not be more than _____ from supports or other rows of bridging.

Answer 23

2.1 m

Question 24

If joist slam is greater than 2.1 m a row of joist restraint is required at the centre of span. T or F

Answer 24

T

Question 25

If a joist is over _____ mm then two rows of bridging are required.

Answer 25

4.2 m

Question 26

Subfloor sheathing should be nailed ____ from the panel edges and ____ at intermediate supports.

Answer 26

150 mm

300 mm

Question 27

Engineered floor components must be stored how?

Answer 27

Vertical position