(a) All machinery and sheaves shall be so supported and secured as to effectively prevent any part from becoming loose or displaced.

(b) If bolts in tension are used, the bolts shall be provided with lock nuts (double nutted) and a cotter pin at the end.

(c) Beams directly supporting machinery shall be of steel or reinforced concrete.

(d) Machinery or equipment shall be secured to and supported on, or from the top of overhead beams or floors.

Exceptions to subsection 3085.5(d):

1. Secondary or deflecting sheaves of traction elevators.

2. Devices and their accessories for limiting or retarding car speed.

3. Driving machines on the car.

(e) Cast iron in tension shall not be used for supporting members for sheaves where they are hung beneath beams. [1500.4a]

(f) The total load on overhead beams shall be equal to the weight of all apparatus resting on the beams plus twice the maximum load suspended from the beams. [1500.4b]

Note: The object in doubling the suspended load is to allow for impact, accelerating stresses, etc.

(g) The factor of safety for overhead beams and their supports shall be not less than 5 for steel and 6 for reinforced concrete. [1500.4c]

(h) Overhead beams and supports shall conform to the requirements of Section 3015. [1500.4d]

(Title 24, Part 7, Section 7-3085.5)