Type B units in Existing Building

[Mech]

2009 IBC

2012 IBC Chapter 11

2012 IBC sections referenced by Chapter 11 (including section 3411)

2009 ICC A117.1

2012 IBC 3411.8.9 Type B dwelling or sleeping units.

Where four or more Group I-1, I-2, R-1, R-2, R-3 or R-4 dwelling or sleeping units are being added, the requirements of Section 1107 for Type B units apply only to the quantity of the spaces being added. Where Group I-1, I-2, R-1, R-2, R-3 or R-4 dwelling or sleeping units are being altered and where the work area is greater than 50 percent of the aggregate area of the building, the requirements of Section 1107 for Type B units apply only to the quantity of the spaces being altered.

What happens when Group R-2 dwelling units are being altered and the work area is less than 50% of the aggregate area of the building? Type B units are not required at all?

Thanks

 

[mark handler]

2009 IBC2012 IBC Chapter 11 and any sections referenced by Chapter 11 (which includes 3411)

2009 ICC A117.1

3411.8.9 Type B dwelling or sleeping units.

Where four or more Group I-1, I-2, R-1, R-2, R-3 or R-4 dwelling or sleeping units are being added, the requirements of Section 1107 for Type B units apply only to the quantity of the spaces being added. Where Group I-1, I-2, R-1, R-2, R-3 or R-4 dwelling or sleeping units are being altered and where the work area is greater than 50 percent of the aggregate area of the building, the requirements of Section 1107 for Type B units apply only to the quantity of the spaces being altered.

What happens when Group R-2 dwelling units are being altered and the work area is less than 50% of the aggregate area of the building? Type B units are not required at all?

Thanks

Correct, unless required by other requirements, like money provided by public sources.

 

[JBI]

The 50% aggregate area in Chapter 34 was a way to identify 'level 3 alterations' before the EBC (and the work area method) was drafted.

BTW, the text of that section on the ICC website is a bit shorter...

3411.8.9 Type B dwelling or sleeping units. Where four or more Group I-1, I-2, R-1, R-2, R-3 or R-4 dwelling or sleeping units are being added, the requirements of Section 1107 for Type B units apply only to the quantity of the spaces being added.

Is the second part a California amendment?

Also in the 2009 IBC:

3411.6 Alterations. A building, facility or element that is altered shall comply with the applicable provisions in Chapter 11 of this code and ICC A117.1, unless technically infeasible. Where compliance with this section is technically infeasible, the alteration shall provide access to the maximum extent technically feasible.

Exceptions:

1. The altered element or space is not required to be on an accessible route, unless required by Section 3411.7.2. Accessible means of egress required by Chapter 10 are not required to be provided in existing buildings and facilities.3. The alteration to Type A individually owned dwelling units within a Group R-2 occupancy shall meet the provision for a Type B dwelling unit and shall comply with the applicable provisions in Chapter 11 and ICC A117.1.3411.7 Alterations affecting an area containing a primary function. Where an alteration affects the accessibility to, or contains an area of primary function, the route to the primary function area shall be accessible. The accessible route to the primary function area shall include toilet facilities or drinking fountains serving the area of primary function.

Exceptions:

1. The costs of providing the accessible route are not required to exceed 20 percent of the costs of the alterations affecting the area of primary function.2. This provision does not apply to alterations limited solely to windows, hardware, operating controls, electrical outlets and signs.3. This provision does not apply to alterations limited solely to mechanical systems, electrical systems, installation or alteration of fire protection systems and abatement of hazardous materials.4. This provision does not apply to alterations undertaken for the primary purpose of increasing the accessibility of an existing building, facility or element.

 

[Mech]

Thanks guys.

JBI - I listed the 2012 IBC version of 3411.8.9. PA adopted 2012 IBC Chapter 11, which references section 3411; I must follow the 2012 version of section 3411. I edited my OP to make this a bit more clear.

 

[Mech]

If the entire renovation process is performed under two or more sets of permits to keep the work area below 50% of the aggregate building area each time, are Type B units required?

I am still working my way through the "new to me" accessibility codes.

 

[Mech]

If the entire renovation process is performed under two or more sets of permits to keep the work area below 50% of the aggregate building area each time, are Type B units required?

Worded another way - can the majority (more than 50%) of a building be renovated under separate permits to keep the work area below 50% of the aggregate building area and not require Type B units?