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2.4.8 Top of Counterweight Clearances
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The top of counterweight clearance shall be not less than the sum of the following items:
(a) the bottom car runby (see 2.4.2)
(b) the stroke of the car buffer used, or the remaining stroke when the buffer is compressed with the car at the bottom terminal landing (see 2.4.2 and 2.22.4.8)
(c) 150 mm (6 in.)
(d) one-half of the gravity stopping distance based on
(1) 115% of the rated speed where oil buffers are used, or 115% of the reduced striking speed when emergency terminal speed-limiting devices meeting the requirements of 2.25.4 are used and no provision is made to prevent the jump of the car at counterweight buffer engagement
(2) the governor tripping speed where spring buffers or elastomeric buffers are used (see 8.2.5 for gravity stopping distances)
Related Code Sections
2.4.8 Electric Elevators, Top of Counterweight Clearances
The top of counterweight clearance shall be not less than the sum of the following items: (a) the bottom car runby (see 2.4.2) (b) the stroke ...
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The top counterweight clearance shall be not less than the sum of the following: (a) the bottom car runby, if any (b) the stroke of the car buffer ...
5.7.4.3 Special Application Elevators, Top Counterweight Clearances
The top counterweight clearance shall be not less than the sum of the following items: (a) the bottom car runby (see 5.7.4.1) (b) the stroke ...
8.7.4.3.2 General Requirements, Top Car and Counterweight Clearances
No alteration shall reduce any clearances or runby below that required by 4.3.3 or below the minimum clearances as originally installed ...
3.4.6.1 Hydraulic Elevators, Top Clearance
The top clearance shall be not less than the sum of the following: (a) the bottom car runby (b) the stroke of the car buffers used (c) 150 mm (6 in.) ...