Fireplaces And Chimneys

Question 1

A masonry fireplace and chimney should be supported on a footing that is at least…

Answer 1

12 inches thick and that extends at least 6 inches beyond each side of the fireplace and chimney

Question 2

The hearth(firebox) should be made from concrete or solid masonry that is at least…

Answer 2

4 inches thick and at least 20 inches deep

Question 3

The hearth extension for a masonry fireplace should be made from concrete and solid masonry that is at least…

Answer 3

2 inches thick.

Question 4

The hearth extension should extend at least ______ in front and at least _____ to each side of the firebox opening that has an area of less than 6 sq. Ft.

Answer 4

16 inches and 8 inches

Question 5

The hearth extension should extend at least _____ in front and at least _____ to each side of a firebox opening that has an area of 6 sq. ft. or more.

Answer 5

20 inches and 12 inches

Question 6

A non-combustible lentil, usually iron or steel, is often installed above the masonry fireplace opening to support the weight of the fireplace surround. The ends of the lentil should extend _____on each side of the fire box opening

Answer 6

4 inches

Question 7

The masonry fireplace throat is the opening between the firebox in a smoke chamber. It should be _____ above the lentil.

Answer 7

8 inches

Question 8

Fireplace clearances to combustibles, wood framing should be _____ away from the sides of masonry fireplace and _____ from the back

Answer 8

2 inches and 4 inches

Combustible sheathing and siding may touch the outside of the firebox if the sheathing or sliding is at least 12 inches from the inside of the firebox

Question 9

Clearance to combustible trim, combustible trim such as a mantle should be located at least _____ from the firebox opening.

Answer 9

6 inches

Combustible trim located between six and 12 inches from the opening should not project from the wall or surround more than 1/8 inch for every inch distance from the fireplace opening.

Question 10

Chimney height. The chimney should terminate at least _____ above where it penetrates the roof and at least _____ above any obstruction within ______

Answer 10

3/2/10 rule

Question 11

Clearance to combustibles. A masonry chimney should have at least _____ clearance to combustible framing materials, such as joist and rafters.

Answer 11

2 inches

Question 12

The fireplace may not share a flu with an appliance such as the furnace or water heater. True or false

Answer 12

True

Question 13

A chimney, or similar obstacle, can block water flow off of a roof. The cricket is recommended if the chimney is wider than _____ parallel to the ridge.

Answer 13

30 inches

Question 14

The area under the rain cap and spark arrester should be at least _____ the area of the flu or flu’s that it covers

Answer 14

Four times

Question 15

The spark arrester should block _____ diameters spheres and should not block _____ diameters spheres.

Answer 15

½ inch and 3/8 inch.