The Ontario Building Code | Loading Requirements
8.7.4.1. Loading Requirements
(1) The area described in Sentence 8.7.4.2.(1) shall be designed such that the loading rate does not exceed, for soil having a percolation timeset out in Column 1 of Table 8.7.4.1., the maximum value set out opposite it in Column 2 of Table 8.7.4.1.
Table 8.7.4.1.
Loading Rates for Fill Based Absorption Trenches and Filter Beds
Forming Part of Sentences 8.7.4.1.(1) and 8.7.5.2.(2)
| Item | Column 1 Percolation Time (T) of soil, min | Column 2 Loading Rates, (L/m2)/day |
| 1. | 1 < T ≤ 20 | 10 |
| 2. | 20 < T ≤ 35 | 8 |
| 3. | 35 < T ≤ 50 | 6 |
| 4. | T > 50 | 4 |
In Plain Language
Loading requirements for a leaching bed, meaning how much effluent per area it can be designed to receive, are set out in this article based on soil type and other site factors.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.