Guide for the Use of ASTM A1035/A1035M Type CS Grade 100 (690) Steel Bars for Structural Concrete

Abstract

This guide presents the material characteristics of ASTM A1035/A1035M (CS) steel bars and recommends design criteria for beams, columns, slab systems, walls, and footings for Seismic Design Category (SDC) A, B, or C.

A structure assigned to SDC A, B or C is required to be designed for all applicable gravity and environmental loads.

In the case of SDC A structures, seismic forces are notional structural integrity forces.

This guide addresses all design required for SDC A, B, and C structures.

Due to lack of adequate data, the application of this guide for SDC D, E, or F is limited to slab systems, foundations, and structural components not designated as part of the seismic-force-resisting system, but explicitly checked for the induced effects of the design displacements.

The only exception is the use of transverse reinforcement for concrete confinement with a specified minimum yield strength fy up to 100,000 psi (690 MPa) in special moment frames, special structural walls, and all components of special structural walls including coupling beams and wall piers as permitted by ACI 318.

Refer to 10.1 of this guide for more information on seismic design considerations.

Shells, folded plate members, and prestressed concrete are beyond the scope of this guide.

However, ASTM A1035/A1035M Type CS can be used as reinforcement in prestressed concrete but not as the prestressing strands.

Design examples are included to illustrate design procedures and proper application of the design criteria.

Modifications to these design criteria may be justified where the design adequacy within the scope of this guide is demonstrated by successful use, analysis, or test.