CMAA Specification No. 70-2015

Table of Contents
70-1 General Specifications
1.1 Scope
1.2 Building Design Consideration
1.3 Clearance
1.4 Crane Runway
1.5 Runway Conductors
1.6 Rated Capacity
1.7 Design Stresses
1.8 General
1.9 Painting
1.10 Assembly and Preparation for shipment
1.11 Testing
1.12 Drawings and Manuals
1.13 Erection
1.14 Lubrication
1.15 Inspection Maintenance and Crane Operator Training
70-2 Crane Classifications
2.1 General
2.2 Class A (Standby or Infrequent Service)
2.3 Class B (light Service)
2.4 Class C (Moderate Service)
2.5 Class D (Heavy Service)
2.6 Class E (Severe Service)
2.7 Class F (continuous Severe Service)
2.8 Crane Service Class in Terms of Load Class and Load Cycles
70-3 Structural Design
3.1
Material
3.2
Welding
3.3 Structure
3.4 Allowable Stresses
3.5 Design Requirements
3.6 Bridge End Truck
3.7 Footwalks and Handrails
3.8 Operator's Cab
3.9 Trolley Frames
3.10 Bridge Rails
3.11 End Ties
3.12 Structural Bolting
3.13 Gantry Cranes
70-4 Mechanical Design
4.1 Mean Effective Load
4.2 Load Blocks
4.3 Overload Limit Device
4.4 Hoisting Ropes
4.5 Sheaves
4.6 Drum
4.7 Gearing
4.8 Bearings
4.9 Brakes
4.10 Bridge Drives
4.11 Shafting
4.12 Couplings
4.13 Wheels
4.14 Bumpers
4.15 Stops
70-5 Electrical Equipment
5.1 General
5.2 Motors--AC and DC
5.3 Brakes
5.4 Controllers, Alternating and Direct Current
5.5 Resistors
5.6 Protection Safety Features
5.7 Master Switches
5.8 Floor Operated Pendant Pushbutton Stations
5.9 Limit Switches
5.10 Installtion
5.11 Bridge Conductor Systems
5.12 Runway Conductor Systems
5.13 Voltage Drop
5.14 Inverters (variable Frequency Drives)
5.15 Remote Control
5.16 Collision Avoidance
5.17 Weigh Scale System
70-6 Crane Inquiry Data Sheet
70-7 Glossary
70-8 Index