AMENDMENTS TO THE BOCA NATIONAL BUILDING CODE/1996

CHAPTER 22 - STEEL

(Amd) 2207.2 Structural steel cable systems: The design, fabrication and erection of steel cables used as load bearing members in buildings and structures shall be in accordance with ASCE 19, Structural Applications of Steel Cables for Buildings, listed in Chapter 35, except as modified by the provisions of Section 2207.2.1.

(Amd) 2207.2.1 Steel cable seismic requirements: The ASCE 19, Structural Applications of Steel Cables for Buildings standard listed in Chapter 35 shall be modified as indicated in this section. The references to sections are those of the ASCE 19 standard listed in Chapter 35.

1. Load combination "d" of Section 3.2.1 shall be modified by substituting 1.5 T₄ instead of 2.0 T₄ where T₄ is the net tension in the cable due to dead load, prestress, live load and seismic load.

2. A load factor of 1.1 shall be applied to the prestress forces to be added to the load combination of Section 3.1 of the steel cable specification.

3. The design strength (S_d ) determined in Section 3.2 shall be reduced by multiplying it by the following seismic reduction factors when evaluating load combinations which include seismic forces:

Members, connections and base plates that develop the strength of the members of structural systems .......... 0.90

Connections that do not develop the strength of the member or structural system, including connections to base plates and anchor bolts .......... 0.67

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