What are the measures to prevent local instability of the beam ( )
A. limit the width-thickness ratio of the plate
B. Increase the section moment of inertia
C. Set the stiffener
D. Increase section area
In the following members, which one can be treated as axially loaded member? （）
A. frame beam
B. shear wall
C. member in steel truss
D. frame column
Q 235B is the ( ).
A. carbon structural steel
B. low alloy structural steel
C. cast steel
D. forged steel
Which of the following are characteristics of the steel structure?
A. High strength and low weight
B. Good plasticity and toughness
C. easy to manufacture and construct
D. Weak corrosion resistance
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