(Solved): 1. Determine the adjusted design values in both ASD and LRFD for the 210 roof purlins with 4 s ...

1. Determine the adjusted design values in both ASD and LRFD for the $2\times 10$ roof purlins with $4^{?}$ spacing in Figure 1. The grade is No.1 \&Btr and the species group is Hem-Fir. Present results in a table similar to the example in class Do not consider buckling or bearing. $>$ Consider dry-service and normal temperature conditions and that incising is needed for wood treatment. $>$ Consider the following ASD load combinations: (i) $\mathrm{D}+\mathrm{L}$, (ii) $\mathrm{D}+0.75\mathrm{L}+0.75\mathrm{LR}$, (iii) $\mathrm{D}\pm 0.6\mathrm{W}$ $>$ Consider the following LRFD load combinations: (i) $1.4\mathrm{D}$, (ii) $1.2\mathrm{D}+1.6$ (LR or $\mathrm{S}$ or $\mathrm{R}$ ) + (L or $0.5\mathrm{W}$ ), (iii) $0.9\mathrm{D}\pm 1.0\mathrm{W}$. Figure 1. Roof plan of a single-story single family wood house Determine the adjusted design values in both ASD and LRFD for the 5 " $x5$ " column $\mathrm{Cl}$ in Figure 1. The grade is Select Structural and the species group is Douglas Fir-Larch. Present results in a table similar to the example in class. Hint: Use Table 4D and the relevant size factor. Do not consider buckling or bearing. $>$ Consider dry-service and normal temperature conditions and no incising. $>$ Consider the following ASD load combinations: (i) $\mathrm{D}+\mathrm{L}$, (ii) $\mathrm{D}+0.75\mathrm{L}+0.75\mathrm{LR}$, (iii) $\mathrm{D}\pm 0.6\mathrm{W}$ $>$ Consider the following LRFD load combinations: (i) $1.4\mathrm{D}$, (ii) $1.2\mathrm{D}+1.6$ (LR or $\mathrm{S}$ or $\mathrm{R}$ ) + (L or $0.5\mathrm{W}$ ), (iii) $0.9\mathrm{D}\pm 1.0\mathrm{W}$.