Western Australian Current Regulations Western Australian Current Regulations (1) A workplace or a
part of a workplace that has the features mentioned in subregulations (2)
and (3) is an enclosed workplace for the purposes of this Division.
(2) An enclosed
workplace is covered by a roof or a part of a roof.
(3) An enclosed
workplace is configured so that the total vertical surface area of the solid
material in the walls is more than 50% of the notional vertical surface area
of the place as assessed in accordance with regulation 50C.
(4) The total vertical
surface area of the solid material in the walls must be assessed
by —
(a)
multiplying the following —
(i)
the length of each wall under the roof or the part of a
roof plus the length of each wall and each section of a wall that is 1 metre
or less beyond the perimeter of the roof or the part of a roof when measured
horizontally from the perimeter of the roof or the part of the roof;
(ii)
the actual height of the walls and wall sections
mentioned in subparagraph (i);
and
(b)
deducting the total vertical surface area of the open parts of the walls or
wall sections mentioned in paragraph (a)(i).
(5) The total vertical
surface area of solid material in a wall must be assessed as if each window,
door or vertical retractable covering in or adjacent to the wall —
(a) is
closed; and
(b)
forms part of the wall.
(6) A place is not an
enclosed workplace for the purposes of this Division if it is covered by a
roof or a part of a roof and is bounded by only —
(a) 1
straight wall; or
(b) 2
straight walls that are set in an angle of 90 degrees or more.
(7) A part of a
workplace may be an enclosed workplace even though —
(a) it
is part of a workplace that is not an enclosed workplace; or
(b) it
is part of another part of a workplace that is not an enclosed workplace.