Page 183 - Handbook of Civil Engineering Calculations, Second Edition

1.166 STRUCTURAL STEEL ENGINEERING AND DESIGN

2.22 × 100 kips × (2.75 in.) 2

t A 1 × 36 kips.in. 2 0.615 in. (1.56 cm)

2. Find the required length of bearing of the beam
A 1 123 sq.in. (>32.7 sq.in. required for bearing on concrete)

A 1 A 1 123 sq.in.
N 15.0 in. (38.1 cm)
B b f 8.24 in.
By increasing the length of bearing of the beam to 15 in. (38.1 cm), the bearing plate can
be eliminated.
Related Calculations. This procedure is the work of Abraham J. Rokach, MSCE, As-
sociate Director of Education, American Institute of Steel Construction. SI values were
prepared by the handbook editor.

PART 3
HANGERS, CONNECTORS, AND
WIND-STRESS ANALYSIS

In the following Calculation Procedures, structural steel members are designed in accor-
dance with the Specification for the Design, Fabrication and Erection of Structural Steel
for Buildings of the American Institute of Steel Construction. In the absence of any state-
ment to the contrary, it is to be understood that the structural-steel members are made of
ASTM A36 steel, which has a yield-point stress of 36,000 lb/sq.in. (248.2 MPa).
Reinforced-concrete members are designed in accordance with the specification
Building Code Requirements for Reinforced Concrete of the American Concrete Institute.

DESIGN OF AN EYEBAR

A hanger is to carry a load of 175 kips (778.4 kN). Design an eyebar of A440 steel.

Calculation Procedure:
1. Record the yield-point stresses of the steel
Refer to Fig. 1 for the notational system. Let subscripts 1 and 2 refer to cross sections
through the body of the bar and through the center of the pin hole, respectively.
Eyebars are generally flame-cut from plates of high-strength steel. The design provi-
sions of the AISC Specification reflect the results of extensive testing of such members. A
section of the Specification permits a tensile stress of 0.60f y at 1 and 0.45f y at 2, where f y
denotes the yield-point stress.