Construct floor joist and deck framing

Question 1

How is the clear span calculated?

Answer 1

By subtracting the sill plate, width and half the beam width from the total joist span

Question 2

Determine the length of floor joists

Answer 2

Determine the joist span, which is half the length subtract the thickness of the joist header subtract three

Question 3

Determine the number of joists required

Answer 3

Length of building divided by joist spacing plus one to start times two for the other side of the beam +2/4 stairwell plus partitions if joist embedded add 4

Question 4

Cross bridge formula

Answer 4

Length of building times three times number of rows

Question 5

Cross bridge. Bundle formula.

Answer 5

Number of pieces in a bundle divided by two

Question 6

What is the difference between total span and clear span of a joist?

Answer 6

Clear spans to sell edge to beam edge. Total span is from outside header to centre beam

Question 7

List three advantages of truss joints over the wood floor, Joist

Answer 7

More rigid floor system

Question 8

Describe the nailing of floor joists to plate

Answer 8

Using 2 82 mm toenails

Question 9

Explain two ways joists can be framed at the beam when they rest on top

Answer 9

Butted and lapped

Question 10

Why are Joyce sometimes framed into the sides of the beam?

Answer 10

To gain more headroom

Question 11

What are two acceptable methods of framing joists into the side of the beam?

Answer 11

Joist hangers and a ledger board

Question 12

What is the minimum end bearing of floor joists?

Answer 12

38 mm to 1/2

Question 13

When does a trimmer joist on the side of an opening have to be doubled

Answer 13

When the length of the header joist exceeds 80 mm

Question 14

When does a header joist on the end of an opening have to be doubled

Answer 14

When length exceeds 1200 mm

Question 15

How does a nonload bearing partition running parallel to the floor joist have to be supported

Answer 15

Joists under the wall

Question 16

Loadbearing interior partitions at right angles to the floor joist Shelby located no more than___millimeters from joist support beam when the wall does not support the floor

Answer 16

900

Question 17

The tail joist are spiked to the single header joist before the doubleheader joists are nailed on

Answer 17

True

Question 18

What determines the size of a floor joist?

Answer 18

Loading span of joist spacing of the joist species of wood grade material, and type of bridging

Question 19

Does the spacing of the floor joist affect the size of the joist?

Answer 19

Yes, it does

Question 20

Holes drilled in floor joists she’ll not be larger than

Answer 20

 A quarter depth of member located, not less than 50 mm from edge

Question 21

Floor joist maybe notched provided the notch is located at the top of the joist and then the proper location

Answer 21

True

Question 22

The notch must not be deeper than___unless the depth of the joist is increased by the size of the notch

Answer 22

1/3

Question 23

Where should the joints on multiple length of joist headers occur?

Answer 23

On the centre

Question 24

What is the maximum amount of 2 x 8 floor Joyce that can be cantilevered if they support the roof load

Question 25

Cantilevered floor, Joyce, that run it right angles to the main joist and support part of the roof load must extend into the floor system, at least__the cantilevered amount

Answer 25

Seven

Question 26

Doubleheader joists are nail together by nails, not less than__inches long, and not more than__inches apart

Answer 26

76 mm or 3 inches and 300 mm or 12 inches

Question 27

The clearance between a masonry, fireplace chimney and floor. Framing shall not be less than_inches for interior chimneys and_inches for exterior chimneys.

Answer 27

2 inches and half an inch

Question 28

What are two primary reasons for using bridging?

Answer 28

Keep Joyce from twisting and reduce spring and bounce in the floor

Question 29

Why should solid bridging be installed before floor sheathing is applied

Answer 29

To help space joists properly

Question 30

Why is solid bridging sometimes used instead of cross bridging

Answer 30

 fill odd size spaces.

Question 31

Why are the bottom ends of the cross bridging not nailed until the subfloor in partitions have been installed?

Answer 31

To allow joist to shrink

Question 32

Joyce restraint must be provided at intervals between supports exceeding.__

Answer 32

2.1 m.

Question 33

Blocking tightly fitted between joists, insecurely nailed, is acceptable for restraining joist twisting

Question 34

Gypsum board attached directly to the joist can be considered equivalent to strapping

Question 35

If the ceiling is furred or cloud with plywood, no additional restraint is required between supports

Question 36

Stairwell rough opening length formula

Answer 36

Headroom plus floor construction divided by unit rise times unit run +5%

Question 37

Straight run with a landing formula

Answer 37

Headroom plus floor construction divided by unit of rise times unit of Ron plus landing minus one unit of run +5%

Question 38

Stairwell length for upper stairs, formula

Answer 38

Unit of runtimes number of treads of upper flight +3 inches for finishing plus width of the landing