172Building surveyor must cause fire and smoke resisting building elements to be inspected

172 Building surveyor must cause fire and smoke resisting building elements to be inspected (1) The relevant building surveyor must cause to be inspected the building work relating to the following in each storey of a Class 2, 3, or 4 building— (a) any building element that is lightweight construction and that is required to resist the spread of fire in at least one sole‑occupancy unit; (b) one of each stair shaft, lift shaft or service shaft that is lightweight construction and that is required to resist the spread of fire; (c) the components of any building element referred to in paragraph (a) or (b); (d) the junctions of any building element referred to in paragraph (a) or (b) with other building elements. (2) The relevant building surveyor must cause to be inspected at least one of each type of fire protection method for each type of service penetration to any building element that is required to resist the spread of fire or smoke on each storey of a Class 2, 3, 4, 9a or 9c building. (3) An inspection for the purposes of this regulation must be carried out when the building element is accessible and able to be clearly viewed. (4) This regulation does not apply in relation to building work carried out under a permit issued before 2 June 2018. (5) In this regulation ***lightweight construction*** means construction which incorporates or comprises sheet or board material, plaster, render, sprayed application, or other material similarly susceptible to damage by impact, pressure or abrasion.