Proper loading
111(2) No person shall operate upon a highway a motor vehicle that carries a load or draws a vehicle that carries a load unless the load is loaded, bound, secured, contained or covered so that no portion of the load may become dislodged or fall, leak, spill or blow from the vehicle.
plus this...
ONTARIO REGULATION 363/04
Securement of load (commercial motor vehicles LESS than 4500kgs = every pickup)
5. (1) A load carried on a commercial motor vehicle on a highway must be secured by means of,
(a) sides, sideboards or stakes and rear stakes, endgate or endboard that,
(i) are securely attached to the vehicle,
(ii) are strong enough and high enough to ensure that the load will not shift on or fall from the vehicle, and
(iii) have no opening large enough to permit any of the load to pass through;
Above is merely a suggestion/thought and in no way constitutes legal advice or views of my employer. www.OHTA.ca