MSC - Erection Manual

MSC M echanically S eamed C onstruction

®

SPECIAL ERECTION TECHNIQUES

RIDGE VENTILATOR INSTALLATION (CONTINUED)

1/4"-14 X 7/8" WT

After Tri-Bead tape mastic has been applied to top of ridge closures, install ventilator in proper location. Be sure to center in opening. Attach ventilator to outside closures with 1/4"-14 x 7/8" WT fasteners. Use Sikaflex 201 to seal between the outside of the ventilator and the end skirt.

SIKA 201

Install the ridge flashing as in Step 15, except for those pieces on either side of ventilator. These will lay on top of, and seal to the ventilator end skirt with a ridge end cap. Use Tri-Bead tape mastic to seal the ridge end cap to the ridge flashing and the end skirt. Use 1/4"-14 x 7/8" WT fasteners to install the end cap. Six fasteners are required to tie the end cap to the ventilator end skirt. Eight fasteners are required to tie the end cap to the ridge flashing. For continuous ventilators, install end skirts on both ends of the first ventilator and one end of all following ventilators. Attach ventilator to outside closures as outlined above. Install an additional 1/4"-14 x 7/8" WT fastener through the corner of the side skirt and into the end skirt.

TRI-BEAD TAPE MASTIC

1/4"-14 X 7/8" WT

END SKIRT

1/4"-14 X 7/8" WT

END SKIRT

RIDGE FLASHING

(8)1/4"-14 X 7/8" WT

RIDGE END CAP

TRI-BEAD TAPE MASTIC

VENTILATOR END CAP

SIKA 201

SIKA 201

TRI-BEAD TAPE MASTIC (6)1/4"-14 X 7/8" WT RIDGE END CAP

Do not connect more than 4 vents to the same control linkage.

1/4"-14 X 7/8" WT

END SKIRT

MSC-62

Version 7.2

SUBJECT TO CHANGE WITHOUT NOTICE