157. (1) No tower crane shall be erected at a project except in accordance with this section. O. Reg. 213/91, s. 157 (1). (2) The foundations supporting a tower crane shall be designed by an engineer in accordance with the crane manufacturer’s specifications and shall be constructed in accordance with the design. O. Reg. 213/91, s. 157 (2); O. Reg. 375/22, s. 5. (3) The shoring and bracing that support a tower crane or tie it in place shall be designed by an engineer in accordance with the crane manufacturer’s specifications and shall be installed in accordance with the design. O. Reg. 213/91, s. 157 (3); O. Reg. 375/22, s. 5. (4) The structural engineer responsible for the structural integrity of the building or structure shall review the design drawings for the foundation, shoring and bracing for a tower crane before the crane is erected at a project to ensure the structural integrity of the building or structure. O. Reg. 213/91, s. 157 (4). (5) The structural engineer who reviews the design drawings shall sign the drawings upon approving them. O. Reg. 213/91, s. 157 (5). (6) The constructor shall keep at the project while a tower crane is erected a copy of the signed design drawings for its foundation, shoring and bracing and any written opinion about the drawings by a structural engineer. O. Reg. 213/91, s. 157 (6). Note: On January 1, 2024, section 157 of the Regulation is revoked and the following substituted: (See: O. Reg. 241/23, s. 12) 157. (1) A tower crane, other than a tower crane mounted on a travelling base using a travelling undercarriage or a self-erecting tower crane that does not require foundations, shall be erected at a project in accordance with this section. O. Reg. 241/23, s. 12. (2) The foundation, shoring and bracing that support a tower crane or tie it in place shall be, (a) designed by an engineer in accordance with the crane manufacturer’s specifications, if any; and (b) constructed, installed and dismantled in accordance with the design drawings, subject to any deviations approved in writing by an engineer. O. Reg. 241/23, s. 12. (3) The engineer who prepares the foundation design drawings shall consider the tower crane ground bearing pressure in preparing the drawings. O. Reg. 241/23, s. 12. (4) Where a building or structure is supporting the tower crane, the engineer responsible for the structural integrity of the building or structure shall review the design drawings for the foundation, shoring and bracing for the tower crane before the crane is erected on a project to ensure the structural integrity of the building or structure. O. Reg. 241/23, s. 12. (5) An engineer shall sign the design drawings for the foundation, shoring and bracing for a tower crane upon approving them. O. Reg. 241/23, s. 12. (6) The constructor shall keep at the project a copy of the signed design drawings for the foundation, shoring and bracing for a tower crane and any written opinion about the drawings by an engineer. O. Reg. 241/23, s. 12. (7) An engineer shall, (a) inspect the foundation supporting a tower crane before the concrete is poured and prepare a written report; and (b) confirm that the foundation or support surface complies with the foundation design drawings, subject to any deviations from the design drawings approved in writing by an engineer. O. Reg. 241/23, s. 12. (8) The written report required under clause (7) (a) shall be kept at the project while the tower crane is on the project. O. Reg. 241/23, s. 12. (9) A tower crane may not be erected until the concrete foundation reaches the strength specified in the design drawings for the foundation. O. Reg. 241/23, s. 12. (10) The shoring and bracing that support a tower crane or tie it in place must be inspected by an engineer after the shoring and bracing or the tie-ins have been installed and before the crane is put into service for the first time at a project. O. Reg. 241/23, s. 12. (11) An engineer shall prepare a written report of the inspection required under subsection (10), which shall include confirmation of whether the shoring, bracing and tie-ins have been installed in accordance with the design drawings, subject to any deviations approved in writing by an engineer and, where a building or structure is supporting the tower crane, whether the building or structure has reached sufficient strength to resist the crane reactions. O. Reg. 241/23, s. 12. (12) The written report prepared shall indicate any circumstances that would require additional inspections of the shoring, bracing and tie-ins by an engineer after the initial inspection required under subsection (10). O. Reg. 241/23, s. 12. (13) After the initial inspection required under subsection (10), the shoring and bracing components and tie-ins installed for the climbing operation shall be inspected by a competent worker, (a) unless otherwise specified by the engineer in the written report required under subsection (11), before and after each climbing operation of the crane, to ensure the shoring and bracing components and tie-ins have been installed in accordance with the foundation design drawings; and (b) weekly after each climbing operation to ensure all the installed shoring and bracing components and tie-ins are in place. O. Reg. 241/23, s. 12. (14) Each major component used for shoring the tower crane shall be marked by a conspicuous label stating that the component shall not be removed or repositioned unless authorized by an engineer. O. Reg. 241/23, s. 12. 157.1 (1) A tower crane shall be, (a) erected plumb to a tolerance of 1:500 unless otherwise specified by the manufacturer; and (b) plumbed while balanced and then held in the plumbed condition by wedges or other means, initially when it is set up and again after each climb. O. Reg. 241/23, s. 12. Note: On January 1, 2025, the Regulation is amended by adding the following sections: (See: O. Reg. 241/23, s. 13) 157.2 A tower crane shall be erected, dismantled and climbed in accordance with the following clauses of CSA Standard Z248-17: 1. Clause 5.1, Crane erection crew. 2. Clause 5.8, Erection, climbing, and dismantling equipment. 3. Clause 5.9, General erection, climbing, and dismantling procedure. O. Reg. 241/23, s. 13. 157.3 (1) Each component of a tower crane manufactured on or after January 1, 2025, must be designed to meet the standards set out in the Table to this section. O. Reg. 241/23, s. 13. (2) If a tower crane manufactured before January 1, 2025 does not meet the standards set out in the Table to this section, or equivalent standards as determined by an engineer, the crane shall not be used until an engineer verifies that the crane has been modified to meet those standards. O. Reg. 241/23, s. 13. TABLE Item   Column 1   Component   Column 2   Minimum design standards 

  1.   Crane design   Clauses 4.1 to 4.25 of CSA Standard Z248-17, or European Standard EN 14439:2006+A2:2009 

  2.   Electrical   Electrical Safety Authority SPEC-009 R0, Electrical Safety for Tower Cranes 

  3.   Control systems   Clause 4.21 of CSA Standard Z248-17 O. Reg. 241/23, Table.