$.$

Designation

$26LB20,L=18$

$y_s=$ Do two load Cases $D_L,$ then botal luad $=30\%$ of the applied load is superimposed dead load

longleftrightarrow$2^{\text{'}-2^{\text{'}\text{'}}}$

$f_c^{\text{'}}=5,000P_{si}$

stress $($uvidspan$).$

$f_{pu}=270,000$ Psi

A$)$ Basic statics concel tos

c$-$live mebhod

$\frac{1}{2}$ in Dia

Load zalancing

Low$-$relexation strand

span, ft $10=\frac{6054}{0\mathrm{.}6},$

$0\mathrm{.}6$

$y_{(c)}$ end $=2\mathrm{.}67in$

$J_{(s)}$ center $=2\mathrm{.}67in$

$A=424i{n}^2$

$J=14,298i{n}^4$

$yb=9\mathrm{.}09$

$b=1573i{n}^3$

$st=1311i{n}^3$

$t=442PlF$