Cal. Code Regs. Tit. 8, § 3109 - Guide Rails, Guide Rail Brackets, Fastenings and Supports for Electric Elevators
(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 ¼ 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.
(c) Rail
Section. When shapes other than those specified in Section
3030(e) are used,
they shall:
(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.
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Notes
2. Editorial correction of subsection (c)(1) (Register 95, No. 41).
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