MIOSHA: Summary: Part 20 Demolition

Question 1

“Balling “ means

Answer 1

to demolish by mechanically swinging a weighted ball.

Question 2

“Competent person” means hazards.

Answer 2

a person who is experienced and capable of identifying an existing or potential hazard in surroundings, or under working conditions, that are hazardous or dangerous to an
employee and who has the authority and knowledge to take prompt corrective measures to eliminate the

Question 3

“Manual demolition” means

Answer 3

stripping or demolition by hand labor.

Question 4

“Mechanical demolition” means

Answer 4

demolition by powered equipment other than hand-held tools.

Question 5

Before the start of a demolition operation, an employer shall ensure that all of the following are done:

An X of the structure and equipment is
conducted by a competent person knowledgeable in demolition to determine all of the following:

i. The condition of the Y.
ii. Whether any adjacent structure Z
iii. The W entering the building.
iv. J affecting the safety of an employee.

Answer 5

engineering survey

i. The condition of the foundation, roof, walls, and floors.
ii. Whether any adjacent structure will be affected by the
demolition.
iii. The utility service entering the building.
iv. Any other conditions and equipment affecting the safety of
an employee.

Question 6

Before the start of a demolition operation, an employer shall ensure that all of the following are done:

An employer shall ensure that there is a X at the field office until the completion of the job. The report shall include information such as the name of the Y. In an emergency situation, a survey is not required.

Answer 6

written report of the survey

person conducting the survey, date of the survey, and hazardous substances and dangerous conditions found and their location

Question 7

Before the start of a demolition operation, an employer shall ensure that all of the following are done:

An employer shall inform utility companies of the planned demolition. An employer shall ensure X, except as specified in subrule (2) of this rule.

Answer 7

that utility services are shut off, capped, or otherwise protected from damage

Question 8

Before the start of a demolition operation, an employer shall ensure that all of the following are done:

An employer shall ensure that X that might cause an injury shall be protected or removed before demolition starts.

Answer 8

glazed sash and doors and other glass

Question 9

During demolition, an existing X shall remain in service as long as possible, and any sprinkler or standpipe system in a portion of a structure that is not subject to demolition shall Y

Answer 9

standpipe system

remain in service

Question 10

If an employee is required to work in a structure that has been damaged by X, then an employer shall ensure that the affected walls and floors are Y before manual demolition starts

Answer 10

fire, flood, or explosion

shored or braced

Question 11

If an area or item, such as a pipe, tank, or bin, is known or suspected to contain a hazardous substance, then an employer shall ensure that X and the hazard eliminated before demolition is permitted to begin.

Answer 11

t testing is performed

Question 12

An employer shall ensure that manual demolition of structural components starts at the X, except that if a connection portion is a different level, then that portion may be removed first. This requirement does not prohibit the cutting of a floor for the removal of materials if the requirements of R 408.42044 are complied with.

Answer 12

top of the structure and proceeds downward so that each level is completely dropped before the next lower wall and floor is dropped

Question 13

An employer shall ensure that an employee shall X during demolition work if weather conditions constitute a hazard.

Answer 13

not be exposed to weather conditions

Question 14

During manual demolition of a structure of skeleton steel
construction, the steel framing may be X, but an employer shall ensure that all structural supports are Y as the demolition proceeds downward.

Answer 14

left in place

cleared of loose material

Question 15

An employer shall ensure that an employee is not permitted to work on a X a floor opening when demolition is conducted on the upper level, unless the employee is protected by a solid barricade not less than
X inches high and located not less than Y
feet back from the projected edge of the opening above.

Answer 15

Floor below
42
6

Question 16

During demolition, an employer or his or her designated
representative shall make X to detect hazards and unsafe conditions. An employer shall ensure that an employee is not permitted to work where hazards exist until the hazards are corrected by shoring, bracing, or other effective means.

Answer 16

daily inspections

Question 17

The area onto and through which material is to be dropped shall be completely enclosed with barricades not less than X inches high and not less than Y feet back from the opening and the area receiving the material. Z shall be posted on the barricades at each level containing the barricades.

Answer 17

42 inches
6 feet back
Signs warning of the hazard of falling
materials

Question 18

Where material is dropped through more than X level, the opening shall be enclosed between the upper and lower levels, an Y shall be provided, or the intermediate levels shall be barricaded as prescribed in subrule (1) of this rule. If the drop is more than Z feet _inside the building, only an enclosed opening or chute shall be used. The chute or enclosure shall extend through W

Answer 18

1
enclosed chute
40
the ceiling of the receiving level

Question 19

A material chute shall be constructed to withstand any X imposed on it without failure.

Answer 19

impact load

Question 20

A material chute, or section thereof, at an angle of more than X degrees from the horizontal shall be entirely enclosed, except for an opening equipped with a closure at or about each floor level for insertion of materials. The opening shall not be more than Y inches
in height measured along the wall of the chute. At all stories below the top floor, the openings shall be kept closed when not in use. The chute shall fit the floor or wall opening or the open space shall be enclosed.

Answer 20

45

48

Question 21

Where material is dumped from mechanical equipment or a wheelbarrow, a toeboard or bumper not less than X inches thick by Y inches high nominal size secured to the floor shall be provided at each Z

Answer 21

4
6
material chute opening

Question 22

Where the drop is more than X feet outside the exterior of the building, a chute as prescribed in subrules (3) to (5) of this rule shall be used and shall extend to within Y feet of the lower level

Answer 22

20

8 feet

Question 23

Removal of X shall not be permitted until material handling by use of a chute ceases.

Answer 23

material, barricades, and chutes