An existing building or portion thereof shall not be altered such that the building becomes less safe than its existing condition.
Exception: Where the current level of safety or sanitation is proposed to be reduced, the portion altered shall conform to the requirements of the International Building Code.
The following sections of the International Fuel Gas Code shall constitute the fuel gas materials and methods requirements for Level 1 alterations.
2.1. Sections 401.8 and 402.3 shall apply when the work being performed increases the load on the system such that the existing pipe does not meet the size required by code. Existing systems that are modified shall not require resizing as long as the load on the system is not increased and the system length is not increased even if the altered system does not meet code minimums.
3. All of Chapter 5, entitled “Chimneys and Vents.”
4. All of Chapter 6, entitled “Specific Appliances.”
A building, facility or element that is altered shall comply with the applicable provisions in Sections 605.1.1 through 605.1.14, Chapter 11 of the International Building Code and ICC A117.1 unless it is technically infeasible. Where compliance with this section is technically infeasible, the alteration shall provide access to the maximum extent that is technically feasible.
A building, facility or element that is constructed or altered to be accessible shall be maintained accessible during occupancy.
1. The altered element or space is not required to be on an accessible route unless required by Section 605.2.
4. The alteration to Type A individually owned dwelling units within a Group R-2 occupancy shall meet the provisions for Type B dwelling units and shall comply with the applicable provisions in Chapter 11 of the International Building Code and ICC A117.1.
Where steeper slopes than allowed by Section 1010.2 of the International Building Code are necessitated by space limitations, the slope of ramps in or providing access to existing buildings or facilities shall comply with Table 605.1.4.
Steeper than 1:10 but not steeper than 1:8
Steeper than 1:12 but not steeper than 1:10
For SI: 1 inch = 25.4 mm.
Where an alteration affects the accessibility to a, 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.
2. This provision does not apply to alterations limited solely to windows, hardware, operating controls, electrical outlets and signs.
Where addition or replacement of roofing or replacement of equipment results in additional dead loads, structural components supporting such reproofing reroofing or equipment shall comply with the gravity load requirements of the International Building Code.
1. Structural elements where the additional dead load from the roofing or equipment is not increased by more than 5 percent. The cumulative effects since original construction shall be considered.
2. Buildings constructed in accordance with the International Residential Code or the conventional construction methods of the International Building Code and where the additional dead load from the roofing or equipment is not increased by more than 5 percent. The cumulative effects since original construction shall be considered.
3. Addition of a second layer of roof covering weighing 3 pounds per square foot (0.1437 kN/m2) or less over an existing, single layer of roof covering.
Exception. Masonry parapets with a height to thickness ratio of 2.5 or less. The height of the parapet shall be measured from the level of where the unreinforced masonry walls are connected to the roof diaphragm.
- The basic wind speed is greater than 90 mph and the occupancy category is type III or type IV as defined in Table 1604.5 of the International Building Code 2009 with Massachusetts Amendments, (780 CMR 1604, Table 1604.5).
- The basic wind speed is greater than or equal to 105 mph.