Where pipe passes through the roof, maintain 1-inch minimum clearance to all combustible materials.

Install oval flashing, storm collar, and oval vent cap.

Gas vent shall extend at least 2 feet above the highest point where it passes through the roof, and at least 2-feet higher than any portion of the building within 10 feet.

Attach base plate to 2" x 4" support. Firestop spacers shall be installed as shown on all floors.

1. Saw out plates between studs and install one firestop spacer.

2. Nail the second firestop spacer in position, after oval pipe is in place.

3. Additional floors above are installed in the same manner.