Concrete, Masonry, and Formwork Safety Flashcards

During post-tensioning operations, what does OSHA require regarding the area behind the jack?

Answer: No employee except those essential may be behind the jack, and signs and barriers must be erected

1926.701(c) keeps non-essential employees from behind the jack and requires signs and barriers to limit access.

What must concrete pumping system pipe supports be designed for?

Answer: 100 percent overload

1926.702(e) requires pipe supports for concrete pumping systems to be designed for 100 percent overload.

What does OSHA require for compressed air hoses used in concrete pumping systems?

Answer: Fail-safe joints at their connection points

Compressed air hoses in pumping systems must have fail-safe joints at connections to prevent whipping.

What is required on powered, rotating-type concrete troweling machines that are manually guided?

Answer: A dead-man control that shuts off power when the operator's hands are removed

1926.702(i) requires a control switch that automatically shuts off power when the operator removes his or her hands.

When working with bull floats near energized electrical conductors, what must the handles be made of?

Answer: Nonconductive material or insulated with nonconductive sheathing

1926.701(e) requires bull float handles used where they may contact energized conductors to be nonconductive or insulated.

How must tremie sections be connected according to 1926.702?

Answer: Secured with wire rope or equivalent materials in addition to regular couplings

Sections of tremies must be secured with wire rope or equivalent in addition to the regular couplings or connections.

An employee is tying rebar on a vertical wall face 12 feet above the lower level. Which fall protection option meets 1926.501(b)(5)?

Answer: A positioning device system, safety net, or personal fall arrest system

Workers on the face of formwork or reinforcing steel 6 feet or more above a lower level must use personal fall arrest, safety nets, or positioning devices.