H9 - Timber Framing

Question 1

what is the max spacing of framing members before it goes into part 4 of the BCBC?

Answer 1

600mm (24”)

Question 2

what are 4 types of timber framing

Answer 2

post and beam, heavy timber, engineered, log and pole

Question 3

what needs to be done to footings to support post and beam?

Answer 3

made more enlarged to support the concentrated point loads

Question 4

what’s the min size of beams and columns for heavy timber construction?

Answer 4

127mm (5 inches) or larger in nominal dimension

Question 5

what kind of structures are heavy timber used for?

Answer 5

trestles, piers, mine tunnels, towers for power lines, false work

Question 6

what does laminated-mill construction easily gets confused with?

Answer 6

glue-lam

Question 7

what kind of structural members are included in the category of engineered timber construction?

Answer 7

glue-laminated lumber and veneer-laminated beams

Question 8

what is a key advantage to glue laminated members?

Answer 8

they can be fabricated into almost any length, size or shape

Question 9

what lumber and moister content makes up glue-lam?

Answer 9

2 and better select structural grade douglas fir, moisture content is between 7%-16%

Question 10

why is it important for the production of glue-lam to be precise?

Answer 10

so no gaps occur in between laminations

Question 11

what glue would be used for interior beams?

Answer 11

Casein glue

Question 12

what glues would be used for exterior beams?

Answer 12

phenol, resorcinol, and melamine resin

Question 13

what are the 4 types of glue lam shapes?

Answer 13

straight, Tapered, symmetrically tapered, curved

Question 14

what is timber framing also refered to as?

Answer 14

platform framing or balloon framing

Question 15

All framing members that space more then 600mm (24 inches OC must conform to which part of the building code?

Answer 15

Part 4

Question 16

who must design and inspect the work?

Answer 16

professional engineer

Question 17

what should the moisture content of timbers be?

Answer 17

close to the moisture level the building will be maintained too. (heated or non heated buildings, geographical location)

Question 18

what must happen to footings to use post and beam?

Answer 18

footings must be enlarged to support concentrated point loads

Question 19

what is minimum size of beams and columns in heavy timber construction?

Answer 19

127mm (5”) nominal dimension

Question 20

Industrial construction uses timber in what three ways?

Answer 20

standard-mill, semi-mill, laminated-mill construction

Question 21

what is the main difference with standard mill?

Answer 21

heavy floor planking rests directly on girders which are supported by columns

Question 22

what is the main difference with semi mill?

Answer 22

floor planking rests on beams, which in turn are supported by girders and columns.

Question 23

what is the main difference with laminated mill?

Answer 23

subfloor planks are laid on edge directly onto girders and lamed together. supported by the girders and columns

Question 24

what is the answer to the glue lam arch question?

Answer 24

1 1/2 inch

Question 25

what is the most significant advantage to glue lam?

Answer 25

can be fabricated in almost any length, size, or structural shape

Question 26

explain a plain scarf joint

Answer 26

a diagonal join across the edge joining the 2 faces

Question 27

explain a stepped scarf joint

Answer 27

same as plane but with a notch in the middle. (looks like a lighting bolt)

Question 28

explain a butt joint

Answer 28

2 90 degree end cuts butting together

Question 29

explain a finger joint

Answer 29

little finger like points the font into each other

Question 30

what is the min for strips to be used to produce a PSL?

Answer 30

380mm (15”)

Question 31

what are shear connectors meant for?

Answer 31

spreading the loads over a greater area than just a bolt

Question 32

what is an advantage of a split ring?

Answer 32

they can expand and contract with the wood

Question 33

what is a split ring installed with?

Answer 33

a split ring groove bit

Question 34

what 2 types of spike grids are there?

Answer 34

double curve, square flat

Question 35

shear plates use ___ to transfer the loads?

Answer 35

the bolt

Question 36

shear plates are used to join what materials?

Answer 36

wood to metal

Question 37

what are clamping plates?

Answer 37

similar to spiked grids except used for lighter loads

Question 38

when are beveled plate washers used?

Answer 38

when the bolt is at an angle to the timbers surface

Question 39

on piles, a drift pin is used for what only?

Answer 39

alignment only

Question 40

pintails are used for what?

Answer 40

transferring the weight of a column to the other without sitting on top of beams and girders allowing for shrinkage.

Question 41

what can be used to support old sagging beams?

Answer 41

king post (1), or queen post (2)

Question 42

what does an adze do and look like?

Answer 42

used to make flat surfaces on logs and timbers. looks like a gardening hoe or axe with a flat head

Question 43

what does a slick do and look like?

Answer 43

large heavy chisel meant to fit timber members together

Question 44

what do is a large drill called meant to connect long bolts together through timbers?

Answer 44

Ship Auger

Question 45

what are Cant hooks used for?

Answer 45

has a large metal hook used to turn timbers and slabs of wood.

Question 46

what is the diameter of a beam saw blade?

Answer 46

16 inches