Track Suspension System

2.2.1

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NOTE: Flexible suspension is preferred if there is

adequate headroom to install it.

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Monorail suspension shall be [flexible] [rigid] type. Make bolted

connections to supporting structure, excluding hanger rods, with ASTM A 325M

ASTM A 325 bolts, ASTM A 563M ASTM A 563 nuts, and ASTM F 959M ASTM F 959

load indicator washers. ASTM A 325M ASTM A 325 bolts shall be fully

pre-tensioned in accordance with AISC 348. Support monorail track system

from the structural members shown. Provide additional supports as required

to carry monorail track system loads to the structural members shown.

Materials for additional supports shall conform to the material

requirements contained in Section 05120 STRUCTURAL STEEL.

2.3

ELECTRIC WIRE ROPE HOIST

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NOTE: Specify double reeved hoist if true vertical

lift is required.

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ASME HST-4, Class H3, except as modified herein.

[Hoist shall be double

reeved.]

2.3.1

Hoisting Ropes

FS RR-W-410, improved or extra improved plow steel, regular lay, uncoated,

6 by 37 class construction, with an independent wire rope core. Provide

proof of wire rope breaking strength test report.

2.3.2

Sheaves

Sheaves shall be steel or ductile cast iron. Pitch diameter of running

sheaves shall not be less than 16 times the rope diameter. Pitch diameter

of non running sheaves shall not be less than 12 times the rope diameter.

2.3.3

Drum

Drum shall be steel or ductile cast iron. Pitch diameter of the drum shall

not be less than 18 times the rope diameter. Not less than two dead wraps

of the hoisting rope shall remain on each anchorage when the hook is in its

extreme low position.

2.4

ELECTRIC CHAIN HOIST

ASME HST-1, Class H3, except as modified herein.

Provide load chain proof

test.

2.5

TROLLEY

Trolley shall meet all applicable requirements of MMA MH27.1, ASME HST-1

and ASME HST-4. Trolley shall have elastomeric bumpers to engage runway

stops.

SECTION 14622N

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