Construction and demolition (C&D) materials consist of the debris generated during the construction, renovation, and demolition of buildings, roads, and bridges. C&D materials often contain bulky, heavy materials that include:
The hazards unique to demolition include all of the following:
The most common types of accidents that result from the hazards associated with demolition are:
It’s important that the engineering survey identify framing, floors, walls of the structure and any adjacent structures that might be unstable. Key engineering and work practices controls for the hazards associated with structural instabilities during demolition include:
During demolition, unsecured objects like glass and structural members may fall while workers are under them. Key hazard control strategies for the hazards associated with unsecured hazards in the work area during demolition include:
It’s important to reduce or eliminate the hazards from utilities that are not properly located and secured. To reduce the hazards associated with utilities:
During demolition, exposure to hazardous substances is likely. To prevent and reduce the hazards associated with the exposure to hazardous substances, do the following:
To eliminate the hazardous substances that have been identified prior to and during demolition, do the following:
To prevent slips, trips and falls, provide and use safe walkways to reach any point without having to walk on exposed beams. Walkways should be at least 18 inches wide and formed by using 2-inch thick wood, with stringers installed as needed for support.
To ensure safe access to the structure, use only inspected and designated stairways, passageways, and ladders, designated as means of access to the structure of a building. Other access ways must be entirely closed at all times.
In a multi-story building, when a stairwell is being used for access or egress, it must be properly illuminated by either natural or artificial means, and completely and substantially covered over at a point not less than two floors below the floor on which work is being performed. Access to the floor where the work is in progress must be through a properly lighted, protected, and separate passageway.
Demolition contractors often come in contact with confined spaces when demolishing structure at industrial sites. These confined spaces can be generally categorized in two major groups:
Examples of these spaces include storage tanks, vessels, degreasers, pits vaults, casing, and silos.
The hazards encountered when entering and working in confined spaces are capable of causing bodily injury, illness, and death. Accidents occur among workers because of failure to recognize that a confined space is a potential hazard. It should therefore be considered that the most unfavorable situation exists in every case and that the danger of explosion, poisoning, and asphyxiation will be present at the onset of entry.
Before beginning this quiz, we highly recommend you review the module material. This quiz is designed to allow you to self-check your comprehension of the module content, but only focuses on key concepts and ideas.
Read each question carefully. Select the best answer, even if more than one answer seems possible. When done, click on the "Get Quiz Answers" button. If you do not answer all the questions, you will receive an error message.