Tread and Riser, FBC or FBRC?

[RICHARD TAN]

Hi Jerry,

I know what FBC (Florida Building Code) mean but lately the builder is referencing to FBRC requirement. What is FBRC? I have noted on the reported the tread was 9 3/4" up to 10" tread is too small and is Life and Safety hazard! but the builder has stated that it did meet FBRC requirement and the reference to §1007.3.1 is incorrect.

IRC
R311.5.3.2 Tread depth. The minimum tread depth, exclusive of nosing shall be 9 inches (254 mm).

FBC 2001
§1007.3.1 Risers shall be a maximum height of 7 in. (17.8 cm) and a minimum height of 4 in. (10.2 cm). Treads shall be a minimum of 11 in.

Which reference is right?

[Jerry Peck - Codeman]

[RICHARD TAN]

Hi Jerry,

From the tile floor to the first tread is 5 5/8", then from the first tread to the second tread is 7 1/2", Tread 10" = 23 1/8. Did not meet the 24"- 25". and not more than 3/8" difference between tread.

[Jerry Peck - Codeman]

[RICHARD TAN]

Hi Jerry,

No nosing, carpet on top.

[Jerry Peck - Codeman]

Hi Richard,

You reported that some treads were only 9-3/4 inches, all those treads less than 10 inches (even if only one tread is less than 10 inches) are REQUIRED to have a nosing, and once one tread has a nosing all need to be the same so all would be required to have a nosing.

Sounds like the stair builder/contractor really screwed that stairway up big time.

[Jerry Peck - Codeman]

Hi Richard,

You reported that some treads were only 9-3/4 inches, all those treads less than 10 inches (even if only one tread is less than 10 inches) are REQUIRED to have a nosing, and once one tread has a nosing all need to be the same so all would be required to have a nosing.

Sounds like the stair builder/contractor really screwed that stairway up big time.