HW $8-$ WOOD

MULTIPLE CHOICE $(4$PT EACH$)$

Which of the following members are considered to be Dimensional Lumber? $($select all that apply$)$

a$.24$

b$.412$

c$.55$

d$.614$

e$.$ All of the above

Which of the following members are considered to be Timbers? $($select all that apply$)$

a$.24$

b$.412$

c$.55$

d$.614$

e$.$ All of the above

The Allowable Bending Stress $($Fb$)$ of a wood member is dependent on: $($select all that apply Hint: Reference NDS Table A$4$

a$.$ The size of the member

b$.$ The type of loading applied to the member

c$.$ The species of the wood

d$.$ The grade of the wood

e$.$ All of the above

Using NDS Table $2\mathrm{.}3\mathrm{.}2,$ what is the correct Load Duration Factor $($Cd$)$ if Dead Load and Snow Load is applied to a member?

a$.0\mathrm{.}9$

b$.1\mathrm{.}0$

c$.1\mathrm{.}15$

d$.1\mathrm{.}25$

What is the correct Size Factor $(Cf)$ for a $48$ when for considering for Allowable Bending Stress $(Fb)?$

a$.1\mathrm{.}0$

b$.1\mathrm{.}1$

c$.1\mathrm{.}2$

d$.1\mathrm{.}3$

Using NDS Table $1B,$ for a nominal $212$ wood beam, what is the Area of the section?

a$.13\mathrm{.}88i{n}^2$

b$.16\mathrm{.}88i{n}^2$

c$.24i{n}^2$

d$.31,64i{n}^2$

Using NDS Table $1$B$,$ for a nominal $618$ wood beam, what is the Section Modulus $($Sx$)$ of the section?

a$.88\mathrm{.}23i{n}^3$

b$.96\mathrm{.}25i{n}^3$

c$.280\mathrm{.}7i{n}^3$

d$.2456i{n}^3$

Using NDS Table $4$ A$,$ for a Douglas Fir$-$Larch No$.2$ member, what is the Modulus of Elasticity $($E$)?$

a$.29,000$ksi

b$.1,900,000$ psi

c$.1,700,000$ psi

d$.1,600,000$ psi

Using NDS Table $4$A$,$ for a Douglas Fir$-$Larch Select Structural member, what is the Allowable Bending Stress $($Fb$)$

a$.1,500$ psi

b$.1,200$ psi

c$.1,000$

d$.900$