Document oMmqgRzGq2rbgpyo1EM68eQr3

BASIC APPLICATION SECTION 3 DUCT INSUL. LO-TEMP EQUIPtfcN? & DUCTWORK (cont'd) Page 32 Hie lags shall be grooved to fit over the ribs or joints as shown in Figure 37A. Hie groove shall be partially filled with 30-45 sealing mastic, sufficient to eliminate any voids between joints and insulation. The lags shall be cemented to the duct insulation with 41-99 P.V.A, mastic. 6B7.2 When the joints or ribs extend more than 3/4" beyond the duct insulation, they shall be insulated as shown in Figure 3$. F16URE 38. (CROSS SECTION)