CRC Building Codes & Standards 2

Question 1

Under the International Residential Code (IRC), what is the minimum ceiling height required for habitable rooms?

Accepted Answer

7 feet 0 inches

Answer

The IRC requires a minimum ceiling height of 7 feet for habitable rooms in residential construction.

Question 2

Which code section governs the minimum stair tread depth for residential construction under the IRC?

Accepted Answer

IRC R311.7.5.2

Answer

IRC Section R311.7.5.2 specifies that residential stair treads must have a minimum depth of 10 inches.

Question 3

A homeowner wants to convert an unfinished basement into a bedroom. What is the minimum egress window opening required by the IRC?

Accepted Answer

5.7 square feet net clear opening

Answer

The IRC requires a minimum net clear opening of 5.7 square feet for basement sleeping room egress windows.

Question 4

Under the IRC, smoke alarms in new residential construction must be interconnected so that when one sounds, all sound. This requirement applies to homes with how many stories?

Accepted Answer

All new residential construction

Answer

The IRC requires interconnected smoke alarms in all new residential construction regardless of size or number of stories.

Question 5

What is the maximum slope allowed for a residential accessible route under the ADA/FHA guidelines when incorporated into IRC-compliant construction?

Accepted Answer

1:12 (8.33%)

Answer

Accessible ramps must not exceed a 1:12 slope (8.33%), meaning 1 inch of rise for every 12 inches of horizontal run.

(CRC) Certified Residential Contractor Practice Test

(CRC) Certified Residential Contractor Practice Test

CRC Building Codes & Standards 2