Q$1.$ For the beam in Problem $4\mathrm{.}1$ of the textbook,

a$.$ Draw the prestressing tendon envelope. Assume that the beam has a depth of $h=$

$36in.,$ the prestressing forces $P_i=405$kips and $P_e=332$kips, allowable tensile

stress at release is $3\sqrt[\phantom{2}]{f^{\text{'}}},$ and the section is class U$.$

b$.$ Calculate the transfer length, development length, and determine the amount and

distribution of transverse reinforcement to be placed in the transfer region. Use

No$.3$ closed ties. Assume $f_{se}=150$ksi and $f_{ps}=0\mathrm{.}9$fpu,$f_{pu}=270$ksi. Note that

ACI $318-19$ code provides details to calculate $f_{ps}$ in Sec. $20\mathrm{.}3\mathrm{.}2\mathrm{.}3$ and $20\mathrm{.}3\mathrm{.}2\mathrm{.}4.$