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Flashcards in Structural Lumber Deck (19)
1

includes structural framing, sheathing, blocking

rough framing

2

product of sawing, planing, preparing wood for use as construction members.

Lumber

3

lumber w min 5in sectional dimension

timber

4

lumber advantages:

plentiful,
low cost,
easy to shape/assemble,
good thermal insulating qualities.

5

lumber disadvantages:

lacks uniform appearance that manufactured materials have.

6

cellular structure of wood brings this problem

dimensional changes when moisture content changes

7

softwood denotes:

coniferous tree

8

hardwood denotes:

deciduous tree

9

used for finish carpentry

hardwood + softwood

10

used for rough carpentry

softwood

11

southern pine is used for rough carpentry in:

southeastern USA

12

douglas fir is used for rough carpentry in :

western region

13

common lumber types for rough carpentry:

hem-fir,
eastern white pine,
hemlock.

14

redwood + cedar are used when:

@ exterior when moisture resistance req'd.

15

lumber strength is dependent on:

load direction vs.
grain direction.

16

Lumber load/grain strength:
strongest combination

compression, load parallel to grain.

17

Lumber load/grain strength:
slightly less strong

tension, load parallel to grain.

18

Lumber load/grain strength:
Least strong

compression, load perpendicular to grain.

19

Lumber load/grain strength:
weakest

horizontal shear force introduced.