According to the textbook, calculator errors are one of the three most common sources of error in structural design.

Concrete forms must be strong enough to support the weight and hydrostatic pressure of the wet concrete, plus any forces applied to it by workers, concrete casting equipment, wind, etc.

Reinforced concrete must crack before the reinforcement can function effectively.

Strength reduction factors are _______ one.

Steel reinforcement is commonly used to supplement for concrete poor strength in tension.

Load combinations are presented in constant action format.

According to the textbook, incorrectly looking up or writing down numbers is one of the three most common sources of error in structural design.

According to the textbook, unit conversions are one of the three most common sources of error in structural design.

The specific weight of plain concrete is often assumed to be _____ lb/ft3.

Undesirable vibrations is an example of a _______.