Francis Vineyard
Registered User
VB sprinklered office building, 30 ft. FSD to the interior lot line.
Am I interpreting this correct that since R-3 VB doesn't get the 10 ft. exception in accordance with section 705.8.1 (Table 602) then the office building combustible deck needs to have at least a FSD of 20 ft. before protection is required (1406.3)?
705.2.3 Combustible projections.
Combustible projections extending to within 5 feet (1524 mm) of the line used to determine the fire separation distance, or located where openings are not permitted, or where protection of some openings is required shall be of at least 1-hour fire-resistance-rated construction, Type IV construction, fire-retardant-treated wood or as required by :Next('./icod_ibc_2012_14_par084.htm')'>Section 1406.3.
Exception: Type VB construction shall be allowed for combustible projections in Group R-3 and U occupancies with a fire separation distance greater than or equal to 5 feet (1524 mm).
705.8.1 Allowable area of openings.
The maximum area of unprotected and protected openings permitted in an exterior wall in any story of a building shall not exceed the percentages specified in Table 705.8.
Exceptions:
1. In other than Group H occupancies, unlimited unprotected openings are permitted in the first story above grade plane either:
1.1. Where the wall faces a street and has a fire separation distance of more than 15 feet (4572 mm); or
1.2. Where the wall faces an unoccupied space. The unoccupied space shall be on the same lot or dedicated for public use, shall not be less than 30 feet (9144 mm) in width and shall have access from a street by a posted fire lane in accordance with the International Fire Code.
2. Buildings whose exterior bearing walls, exterior nonbearing walls and exterior primary structural frame are not required to be fire-resistance rated shall be permitted to have unlimited unprotected openings.
Am I interpreting this correct that since R-3 VB doesn't get the 10 ft. exception in accordance with section 705.8.1 (Table 602) then the office building combustible deck needs to have at least a FSD of 20 ft. before protection is required (1406.3)?
705.2.3 Combustible projections.
Combustible projections extending to within 5 feet (1524 mm) of the line used to determine the fire separation distance, or located where openings are not permitted, or where protection of some openings is required shall be of at least 1-hour fire-resistance-rated construction, Type IV construction, fire-retardant-treated wood or as required by :Next('./icod_ibc_2012_14_par084.htm')'>Section 1406.3.
Exception: Type VB construction shall be allowed for combustible projections in Group R-3 and U occupancies with a fire separation distance greater than or equal to 5 feet (1524 mm).
705.8.1 Allowable area of openings.
The maximum area of unprotected and protected openings permitted in an exterior wall in any story of a building shall not exceed the percentages specified in Table 705.8.
Exceptions:
1. In other than Group H occupancies, unlimited unprotected openings are permitted in the first story above grade plane either:
1.1. Where the wall faces a street and has a fire separation distance of more than 15 feet (4572 mm); or
1.2. Where the wall faces an unoccupied space. The unoccupied space shall be on the same lot or dedicated for public use, shall not be less than 30 feet (9144 mm) in width and shall have access from a street by a posted fire lane in accordance with the International Fire Code.
2. Buildings whose exterior bearing walls, exterior nonbearing walls and exterior primary structural frame are not required to be fire-resistance rated shall be permitted to have unlimited unprotected openings.