4.1.5.9.Concentrated Loads

(1) The specified live load due to possible concentrations of load resulting from the use of an area of floor or roof shall
     not be less than that listed in Table 4.1.5.9. applied over the loaded area noted and located so as to cause maximum
     effects, except that for occupancies not listed in Table 4.1.5.9., the concentrations of load shall be determined in
     accordance with Article 4.1.5.2.

                                                         Table 4.1.5.9.
                                 Specified Concentrated Live Loads on an Area of Floor or Roof
                                              Forming Part of Sentence 4.1.5.9.(1)

                                                                                 Minimum Specified
                            Area of Floor or Roof                                                       Loaded Area, mm x mm
                                                                                Concentrated Load, kN
Roof surfaces                                                                            1.3                   200 x 200
Floors of classrooms                                                                     4.5                   750 x 750
Floors of offices, manufacturing buildings, hospital wards and stages                    9.0                   750 x 750
Floors and areas used by vehicles not exceeding 4000 kg gross weight                     18                    120 x 120
Floors and areas used by vehicles exceeding 4000 kg but not exceeding
                                                                                            36                 120 x 120
9000 kg gross weight
Floors and areas used by vehicles exceeding 9000 kg gross weight                        54(1)                 250 x 600(1)
Driveways and sidewalks over areaways and basements                                     54(1)                 250 x 600(1)

Notes to Table 4.1.5.9.:
(1) See Note A-Table 4.1.5.9.

This provision includes a table — formatting is preserved from the source; refer to the official code for the authoritative layout.

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Code text is reproduced for reference from the Ontario Building Code (O. Reg. 163/24, 2024 Building Code Compendium). This page is provided for general information and is not an official copy. Always verify requirements against the official Ontario Building Code and confirm with your local building department.