California Code of Regulations
Title 8 - Industrial Relations
Division 1 - Department of Industrial Relations
Chapter 4 - Division of Industrial Safety
Subchapter 6 - Elevator Safety Orders
Group II - Elevator Installations for Which the Installation Contract Was Signed Before October 25, 1998
Article 18 - Design Data, Formulas, Tests on Approved Devices, and Electrical Regulations
Section 3109 - Guide Rails, Guide Rail Brackets, Fastenings and Supports for Electric Elevators

Universal Citation: 8 CA Code of Regs 3109

Current through Register 2024 Notice Reg. No. 38, September 20, 2024

(a) Stresses and Deflections.

(1) The stresses in a guide rail, or in a rail and its reinforcement, due to the horizontal forces imposed on the rail during loading, unloading, or running, calculated without impact, shall not exceed 15,000 pounds per square inch based upon the class of loading. The deflection, calculated on the same basis, shall not exceed 1/4 inch.

EXCEPTION: Where steels of greater strength than those specified in Section 3109(b) are used, the stresses may be increased proportionately based on the ratio of the ultimate strengths.

(2) The guide rail brackets, their fastenings and supports, such as building beams and walls, shall be capable of resisting the horizontal forces imposed by the class of loading with a total deflection at the point of support of not more than 1/8 inch.

(b) Requirements for Steel.

(1) Rails, brackets, fishplates, and rail clips shall be made of open-hearth steel or its equivalent having a tensile strength of not less than 55,000 pounds per square inch and having an elongation of not less than 22 percent in a length of 2 inches.

(2) Bolts shall conform to ASTM A-307.

(3) Rivets shall conform to ASTM A-502.

(1) Have a section modulus and moment of inertia equal to or greater than that of the sections shown in Figure 3030 E for a given loading condition.

(2) Have a sectional area sufficient to withstand the compressive forces resulting from the application of the car or counterweight safety device.

(d) Moment of Inertia for a Single Guide Rail. The minimum moment of inertia about an axis (1-1) parallel to the base of a single rail or to the base of a single rail and its reinforcement for a car or counterweight with a safety device, is given in Figure 3109 D for total weight per pair of rails and bracket spacing.

NOTE: The moments of inertia of the most common size standard T-rails are shown in Figure 3109 D as vertical lines.

Click here to view image

1. Amendment of subsection (d) filed 6-23-77; effective thirtieth day thereafter (Register 77, No. 26).
2. Editorial correction of subsection (c)(1) (Register 95, No. 41).

Disclaimer: These regulations may not be the most recent version. California may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.