Floor Frame Support Systems

Question 0

How should columns be installed?

Answer 0

Centrally located on footings and securely fastened to the supported member and the supporting footings to prevent lateral moment. Must be plumb.

Question 1

What is a column?

Answer 1

A vertical length of wood, metal, etc. that transfers loads to supports below.

Question 2

What size of steel pale would need to be on top of a steel column supporting a wood beam?

Answer 2

It must extend the full width of the beam and must not be less than 100 in length and 6.35 mm in thickness. Must have a minimum 100 mm

Question 3

What is the benefit of a teleport over a non-adjustable column?

Answer 3

As a home settles after construction and the wood members shrink, the steel telepost cab be adjusted by turning the threaded shaft at the top of the pipe to accommodate the movement.

Question 4

Why and how must the base of a wood column be protected when in contact with a footing?

Answer 4

Wood columns are susceptible to rot at the point of contact with concrete supported by soil. Wood columns must be separated from concrete in contact with the ground by polyethylene film or Type S roll roofing.

Question 5

Can a built-up wood column be constructed of short pieces from the job site?

Answer 5

No. The layers must be full length and must not be less than 38 mm (1 1/2”) in thickness.

Question 6

Can a carpenter glue some plywood together and make an engineered column.

Answer 6

Engineered wood product columns must be manufacture according to the specific standards and cannot be made on site by carpenters.

Question 7

When must an engineer be involved in designing header joists for a floor frame?

Answer 7

If the header exceeds 3200 mm

Question 8

The maximum hole size in a solid wood joist can NOT be more than _____ % of the joist depth.

Answer 8

25 %

Or 1/4

Question 9

Steel pipe can be used if the outside diameter is 73 mm (2 7/8) or more and the wall thickness is not less than 4.76 mm.
T or F

Answer 9

T

Question 10

A concrete ______ can be installed to raise the base of the wood post above the floor level and reduce potential water damage.

Answer 10

Pedestal

Question 11

Wood columns must be separated from concrete in contact with the ground by ______ film or ____ _ roll roofing.

Answer 11

Polyethylene

Type S roll roofing

Question 12

Solid wood postwar be min. 140 x 140

T or F

Answer 12

T

Question 13

Built up wood beam columns layers must be ____ length and not less than ____ in thickness.

Answer 13

Full

38 mm

Question 14

What is a glue laminated column?

Answer 14

Layers of solid wood that are glued, rather than nailed or bolted, together.

The glue creates a much stronger joint or bond than a fastener. Resulting in the use of smaller columns agree larger ones would typically be required.

Question 15

What is parallel strand lumber columns?

Answer 15

Constructed of long strands of wood arranged parallel to the strength of the member, then glued and pressed together.

Question 16

Why might a T-footing be used for interior load bearing wall?

Answer 16

To raise the base of wall away from the floor in order to prevent decay of the wood and transfer loads to the supporting soil below.

Question 17

If a load bearing wall is left unfinished, ______ or ______ should be fastened to the studs at mid-height.

Answer 17

Blocking or strapping.

Question 18

What is a pony wall?

Answer 18

A short load bearing wood wall, framed above a concrete foundation wall.

Question 19

What can be done if a foundation wall is not level?

Answer 19

A bed of mortar can be used to level the base for the pony wall.

Question 20

A beam pocket should provide no less than ____ mm end bearing.

Answer 20

89 mm

Question 21

How can a beam be protect at or below ground level?

Answer 21

12 mm air space or wood preservative.

Question 22

Beam support within 150 mm of ground or below require special protection?

Answer 22

Preservative, poly, Type S roll

Question 23

What is supported joist length?

Answer 23

Half the sum of the joist span on both sides

Question 24

A built up beam could be made up of 3,4, or 5 layers of dimensional lumber fastened together. T or F

Answer 24

T

Question 25

What is a Laminated Veneer Lumber?

Answer 25

A series of thin, graded wood plys or veneer is laminated together to form a beam.

Question 26

Is the grain in lvl layers all parallel?

Answer 26

Yes

Question 27

A ladder system uses a pair of 2x4s assembled on edge with spacer blocks at ____ on centre.

Answer 27

1.2

Question 28

If you are not going to finish (drywall) a load bearing wall, what must be done?

Answer 28

Blocking or strapping

Question 29

What is a pony wall?

Answer 29

The upper wood frame portion of a foundation wall. The pony wall is designed to transfer loads to the concrete wall below.

Question 30

List two possible benefits of a pony wall?

Answer 30

A) insulated easily
B) window openings
C) exterior and interior finishes can be attached with wood fasteners

Question 31

How do you determine the size of a beam pocket?

Answer 31

Must be constructed to provide the beam with even and level support. Bearing no less than 89 mm with a minimum 12 mm air space. 12 mm on each side.

Question 32

Which direction do beams typically run relative to the foundation?

Answer 32

Lengthwise

Question 33

What factors determine the size of steel beam required?

Answer 33

The numbers of columns, the placement of columns and the spans of the joists on each side of the beam determine the size and strength of steel beam required.

Question 34

Why must you restrain the top flange of a steel beam, regardless of where the joist is supported on the beam?

Answer 34

So that it is laterally supported (cannot move from side to side) in some manner by the joist.

Question 35

Describe how to determine supported joist length in metres.

Answer 35

SJL in metres is the calculation of half the sum of the joist spans on both sides of the beam. This gives the amount of load transferred to the bean through the joists, measured in metres of length.

Question 36

What determines the size and number of layers required to construct a wood beam?

Answer 36

The size of material you want to use
The beam size material
Whether columns must be located at specific points
Whether you need a specific number of columns

Question 37

Why are you not allowed to cut or place a butt joint in a single span beam?

Answer 37

The bottom of the beam is in tension. Any material removed from the bottom edge of the built-up wood beam or an individual member (a joint, cutting , notching, etc.) effectively reduces it’s strength by the amount of material removed.

Question 38

Which is stronger when used to span the same distance: three separate built-up wood beams or one continuous built-up wood beam?

Answer 38

Several individual built-up wood beams laid end-to-end are not as strong as a continuous built up wood beam spanning several supports.

Question 39

Clearance extension of foundation above grade to prevent rot?

Answer 39

150 mm

Question 40

Minimum clearance of cladding above grade to stop rot?

Answer 40

200 mm

Question 41

Bridging and strapping placement needed when joist span is greater than _____ mm.

Answer 41

2.1

Question 42

Beam nail pattern should be ____ to ____ from edges and double row of ____ on centre.

Answer 42

100-150 mm

450 mm