International Existing Building Code 2012 (IEBC 2012)

Level 1 alterations as described in Section 503 shall comply with the requirements of this chapter. Level 1 alterations to historic buildings shall comply with this chapter, except as modified in Chapter 12.
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.
In flood hazard areas, alterations that constitute substantial improvement shall require that the building comply with Section 1612 of the International Building code.
All newly installed interior wall and ceiling finishes shall comply with Chapter 8 of the International Building Code.
New interior floor finish, including new carpeting used as an interior floor finish material, shall comply with Section 804 of the International Building code.
All newly installed interior trim materials shall comply with Section 806 of the International Building code.
All new work shall comply with the materials and methods requirements in the International Building Code, International Energy Conservation Code, International Mechanical Code, and International Plumbing Code, as applicable, that specify material standards, detail of installation and connection, joints, penetrations, and continuity of any element, component, or system in the building.
The following sections of the International Fuel Gas Code shall constitute the fuel gas materials and methods requirements for Level 1 alterations.

1. All of Chapter 3, entitled “General Regulations,” except Sections 303.7 and 306.

2. All of Chapter 4, entitled “Gas Piping Installations,” except Sections 401.8 and 402.3.

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.”

Alterations shall be done in a manner that maintains the level of fire protection provided.
Alterations shall be done in a manner that maintains the level of fire protection provided for the means of egress.

Deleted (see the 2015 Minnesota Accessibility Code).

Where alteration work includes replacement of equipment that is supported by the building or where a reroofing permit is required, the provisions of this section shall apply.
Where addition or replacement of roofing or replacement of equipment results in additional dead loads, structural elements supporting such 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 does not increase the demand-capacity ratio for the element by more than 5 percent. Additional loads due to snow retention as a result of a change in roof insulation shall be included in the evaluation.

2. Buildings constructed in accordance with the conventional light frame construction methods of the International Building Code and where the dead load from the roofing equipment is not increased by more than 5 percent.

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.

The requirements of this section shall apply to alteration work requiring reroof permits.
Where a permit is issued for reroofing for more than 25 percent of the roof area of a building assigned to Seismic Design Category D, E or F that has parapets constructed of unreinforced masonry, the work shall include installation of parapet bracing to resist the reduced International Building Code level seismic forces as specified in Section 301.1.4.2 of this code, unless an evaluation demonstrates compliance of such items.
Where roofing materials are removed from more than 50 percent of the roof diaphragm or section of a building located where the basic wind speed is greater than 90 mph or in a special wind region, as defined in Section 1609 of the International Building code, roof diaphragms, connections of the roof diaphragm to roof framing members, and roof-to-wall connections shall be evaluated for the wind loads specified in the International Building Code, including wind uplift. If the diaphragms and connections in their current condition are not capable of resisting at least 75 percent of those wind loads, they shall be replaced or strengthened in accordance with the loads specified in the International Building Code.
For energy conservation requirements, see Minnesota Rules, Chapters 1322 and 1323, as applicable (see the 2015 Minnesota Energy Code).