780 CMR, ch. 34, pt. 1, 307, [BS] 1103.1
Any existing gravity load-carrying structural element for which an addition and its related alterations cause an increase in design gravity load shall be replaced or altered as needed to carry the gravity loads required by the International Building Code for new structures. Any existing gravity load-carrying structural element whose gravity load-carrying capacity is decreased as part of the addition and its related alterations shall be considered to be an altered element subject to the requirements of Section 806.2. Any existing element that will form part of the lateral load path for any part of the addition shall be considered to be an existing lateral load-carrying structural element subject to the requirements of Section 1103.3.
Exception: Add exception number 2.
Structural elements whose demand capacity ratio is not increased by more than 5%.
CHAPTER 13 PERFORMANCE COMPLIANCE METHODS Delete chapter.
CHAPTER 15 CONSTRUCTION SAFEGUARDS Delete chapter and replace with note that construction safeguards shall comply with Chapter 33 of the International Building Code.
780 CMR, ch. 34, pt. 1, 307, [BS] 1103.1