238. (1) In this section, “cleat” means a member of shoring that directly resists the downward movement of a wale or strut; (“tasseau”) “o/c” means the maximum distance measured from the centre of one member of sheathing, wale or strut to the centre of the adjacent member of sheathing, wale or strut; (“c. à c.”) “post” means a vertical member of shoring that acts as a spacer between the wales; (“montant”) “10 millimetres gap” means that the space between two adjacent members of sheathing is a maximum of ten millimetres. (“écart de 10 millimètres”) O. Reg. 213/91, s. 238 (1). (2) Timbering and shoring referred to in clause 235 (1) (a) for the walls of an excavation with a depth described in Column 1 of the Table to this section and located in a soil type described in Column 2 of the Table shall meet the corresponding specifications set out in Columns 3 to 8 of the Table. O. Reg. 345/15, s. 25 (1). (3) Every piece of sheathing referred to in the Table to this section shall be made of sound Number 1 Grade spruce and, (a) shall be placed against the side of the excavation so that it is vertical; (b) shall be secured in place by wales; and (c) shall be driven into the soil and firmly secured in place if the excavation is made in Type 3 or 4 soil. O. Reg. 213/91, s. 238 (3). (4) Every strut referred to in the Table to this section shall be made of sound number 1 structural grade spruce and, (a) shall be placed in the excavation so that it is horizontal and at right angles to the wales; (b) shall be cut to the proper length and held in place by at least two wedges driven between the strut and the wales; and (c) shall be cleated with cleats that extend over the top of the strut and rest on the wales or that are attached securely to the wales by spikes or bolts. O. Reg. 213/91, s. 238 (4). (5) Every wale referred to in the Table to this section shall be made of sound number 1 structural grade spruce and, (a) shall be placed in the excavation so that it is parallel to the bottom, or proposed bottom, of the excavation; and (b) shall be supported by either cleats secured to the sheathing or posts set on the wale next below it or, if it is the lowest wale, on the bottom of the excavation. O. Reg. 213/91, s. 238 (5). TABLE   EXCAVATION SHORING AND TIMBERING Item   Column 1   Excavation Depth   Column 2   Soil Type   Column 3   Sheathing   Column 4   Strut width where width of excavation at strut location is 1.8 to 3.6 metres   Column 5   Strut width where width of excavation at strut location is up to 1.8 metres   Column 6   Vertical strut spacing   Column 7   Horizontal strut spacing   Column 8   Wales 

  1.   3.0 m or less   1   50 mm × 200 mm at 1.2 m o/c   200 mm × 200 mm   150 mm × 150 mm   1.2 m   * 2.4 m   *200 mm × 200 mm 

  2.   3.0 m or less   2   50 mm × 200 mm at 1.2 m o/c   200 mm × 200 mm   150 mm × 150 mm   1.2 m   * 2.4 m   *200 mm × 200 mm 

  3.   3.0 m or less   3   50 mm × 200 mm at 10 mm gap   200 mm × 200 mm   200 mm × 200 mm   1.2 m     2.4 m   250 mm × 250 mm 

  4.   3.0 m or less   4   75 mm × 200 mm at 10 mm gap   250 mm × 250 mm   200 mm × 200 mm   1.2 m     2.4 m   300 mm × 300 mm 

  5.   Over 3.0 m to 4.5 m   1   50 mm × 200 mm with 10 mm gap   200 mm × 200 mm   150 mm × 150 mm   1.2 m   2.4 m   200 mm × 200 mm 

  6.   Over 3.0 m to 4.5 m   2   50 mm × 200 mm with 10 mm gap   200 mm × 200 mm   200 mm × 200 mm   1.2 m   2.4 m   250 mm × 250 mm 

  7.   Over 3.0 m to 4.5 m   3   50 mm × 200 mm with 10 mm gap   250 mm × 250 mm   250 mm × 250 mm   1.2 m   2.4 m   250 mm × 250 mm 

  8.   Over 3.0 m to 4.0 m   4   75 mm × 200 mm with 10 mm gap   300 mm × 300 mm   300 mm × 300 mm   1.2 m   2.4 m   300 mm × 300 mm 

  9.   Over 4.5 m to 6.0 m   1   50 mm × 200 mm with 10 mm gap   200 mm × 200 mm   200 mm × 200 mm   1.2 m   2.4 m   200 mm × 200 mm 

  10.   Over 4.5 m to 6.0 m   2   50 mm × 200 mm with 10 mm gap   250 mm × 250 mm   250 mm × 250 mm   1.2 m   2.4 m   250 mm × 250 mm 

  11.   Over 4.5 m to 6.0 m   3   50 mm × 200 mm with 10 mm gap   300 mm × 300 mm   300 mm × 300 mm   1.2 m   2.4 m   300 mm × 300 mm *Note: For excavations to 3 m deep in soil types 1 and 2, the wales can be omitted if the struts are used at 1.2 m horizontal spacings. O. Reg. 213/91, s. 238, Table; O. Reg. 631/94, s. 9; O. Reg. 345/15, s. 25 (2).