It’s a shame that they put up the plywood so one can’t see more. Why do construction sites do this?
Because its the law to ensure a safe worksite:
363-15
General requirements
Every fence required by this article shall:
A. Be erected at the perimeter of the site to fully enclose the site.
B. Be built to deter entry by unauthorized persons or vehicles.
C. Have no rails, other horizontal or diagonal bracing, attachments or pattern of openings on the outside that would facilitate climbing.
D. Contain no opening more than 150 millimetres wide or less than 900 millimetres above the bottom of the fence except where required for access to and from the site.
E. At any access opening, be equipped with gates that shall:
(1) Contain wire mesh or similar material sufficient to provide visibility for traffic entering or exiting the site;
(2) Be built to specifications that provide performance and safety at least equivalent to the fence; and
(3) Deter entry by unauthorized persons;
363-17
Fence construction standards.
A fence required by §363-14 shall be built to the following minimum standards:
A.If erected between an excavation and a public sidewalk or lane that is within 3.0 metres of the excavation, the fence shall be built of wood.
B. If built of wood, the outside face shall be smooth exterior grade plywood or wafer board 12.5 millimetres thick that is close-boarded, securely nailed or screwed to 89 millimetre by 89 millimetre vertical posts spaced at 2.4 metre centres and embedded sufficiently deep into the ground to provide a rigid support, and securely nailed or screwed to 39 millimetre by 89 millimetre horizontal rails secured to the vertical posts at the top, bottom and intermediate locations at 600 millimetre centres.
C. If built with plastic mesh, the fencing shall be fastened securely at 200 millimetre centres to steel T or 50 millimetre wide U posts, spaced at not more than 1.2 metre centres and embedded at least 600 millimetres into the ground, with the top and bottom of the plastic mesh secured horizontally by an 11-gauge lacing cable threaded through the mesh and looped and fastened to each post.
D. If built with chain link, the mesh shall have openings no larger than 50 millimetres and shall be fastened securely both to vertical steel posts, spaced at not more than 2.4 metre centres and embedded at least 600 millimetres into the ground, and to top and bottom horizontal steel rails or 9-gauge steel wire.
E. Any hoarding, canopy or similar protective barrier required under provincial law may form part of the fence.
F. The fence may be a combination of the fence types specified in this article or may be built of other materials if the fence can be shown to provide performance and safety equivalent to fence types specified and the Chief Building Official authorizes its use.