TRAINING
TRAINER: MAI THANH LIÊM
Crane Figure
Hoist Figure
OVERVIEW
DESIGN
OVERHEAD CRANE
GUIDELINES
MOTOR POWER
CALCULATION
OVER
VIEW
OVER VIEW
REFERENCE DOCUMENT
1. TCVN 4244-2005 – THIẾT BỊ NÂNG - THIẾT KẾ, CHẾ TẠO VÀ KIỂM TRA KỸ THUẬT
2. GUILDLINE OF NORTH AMERICAN INDUSTRIES, INC.
3. IS 3177:1999 CODE OF PRACTICE FOR ELECTRIC OVERHEAD TRAVELLING
CRANES AND GANTRY CRANES OTHER THAN STEEL WORK CRANES
4. BS 2573-1:1983 RULES FOR THE DESIGN OF CRANES. PART 1: SPECIFICATION FOR
CLASSIFICATION, STRESS CALCULATIONS AND DESIGN CRITERIA FOR
STRUCTURES
OVER VIEW
DEFINATION
An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An
overhead crane consists of parallel runways with a traveling bridge spanning the gap. A hoist, the lifting
component of a crane, travels along the bridge. If the bridge is rigidly supported on two or more legs running on
a fixed rail at ground level, the crane is called a gantry crane or a goliath crane
Traversing/ Running Lateral
Travelling/ Running axial
Lifting
DESIGN
APPLICATION
CLASSIFICATION
CAPACITY
TYPE OF CRANE
POINTS WHEN
DESIGN CRANE
OPERATION RANGE
- Lifting height
- Long of travelling
- Long of traversing
SPEED
SAFETY ACCESSORIES
GUIDELINE
CLASSIFICATION OF THE CRANE AS A WHOLE
1/ The class of utilization of the crane shall be determined from its assumed total number of all operating cycles
during its intended life. For the purposes of classification, an operating cycle shall be considered to commence
when a load is picked up and end at the moment when the crane is ready to pick up the next load
Where insufficient
information is available
for calculating the total
number of operating
cycles. Where there is
difficulty in assigning a
suitable value, the next
highest figure in Table
4 shall be taken.
DESIGN
CLASSIFICATION OF THE CRANE AS A WHOLE
2/ Spectrum factor (phổ tải)
DESIGN
CLASSIFICATION OF THE CRANE AS A WHOLE
2/ Spectrum factor (phổ tải)
Where details of the numbers and weights of the lifted loads during the intended life of the crane
are not known, the descriptive definitions in Table 5 shall be used to assist the selection of an appropriate
state of loading and corresponding nominal load spectrum factor.
DESIGN
CLASSIFICATION OF THE CRANE AS A WHOLE
Determination of group classification of the crane. The group classification of the crane shall be determined
from Table 6 using the class of utilization and state of loading
DESIGN
CLASSIFICATION OF THE CRANE AS A WHOLE
DESIGN
CLASSIFICATION OF THE CRANE AS A WHOLE
GUIDELINE
CLASS OF MECHANISMS
Mechanisms shall be classified into groups according to their desired service life and the conditions of
loading to which they are subjected. The two factors considered in determining the group to which a
mechanism belongs shall be its class of Utilization and Its State Of Loading.
1/ THE CLASS OF UTILIZATION
for a mechanism shall be determined
from its assumed service life in hours.
This is the total number of hours for
which the mechanism will be in
motion.
Where the appliance of
which the mechanism is
part has known duties
There it performed part of
a continuous
Repetitive process
The mechanism
The service life
The number of working
days per year
The number of years of
expected service.
GUIDELINE
CLASS OF MECHANISMS
In the absence of such information regarding the duty of the appliance, an assumed daily utilization time
shall be used as the table below:
GUIDELINE
CLASS OF MECHANISMS
2/ STATE OF LOADING
The state of loading characterizes the extent to which a mechanism is subjected to its maximum loading and
to smaller loadings.
Where details are available of the loading that the mechanism will experience, the nominal load spectrum
factor, Km, and corresponding state of loading shall be determined as follows.
DESIGN
CLASS OF MECHANISMS
2/ STATE OF LOADING
When details of the loading to which the mechanism will be subjected are not known. An appropriate
nominal state of loading shall be selected and the descriptive remarks in Table 12 used to assist in such cases.
DESIGN
CLASS OF MECHANISMS
2/ STATE OF LOADING
DESIGN
CLASS OF MECHANISMS
DETERMINATION OF GROUP CLASSIFICATION
When the class of utilization and the state of loading have been determined in accordance with Utilization
and State Of Loading, the group classification of a mechanism shall be determined from table below.
DESIGN
CLASS OF MECHANISMS
DESIGN
CLASS OF MECHANISMS
DESIGN
CLASSIFICATION
OVERHEAD CRANE
GUIDELINE
OVERHEAD CRANE GUIDELINE
INPUT DATA
FACTORY
INFORMATION
OPERATION
DATA
CONSTRUCTION
ELECTRIC
ACCESSORIES
OVERHEAD CRANE
GUIDELINE
INPUT DATA
INPUT
DATA
Weigh of freight
Type of freight
Application
Location of
Crane
Average time of
supposed daily
operation
State of Loading
OVERHEAD CRANE
GUIDELINE
FACTORY INFORMATION
OVERHEAD CRANE
GUIDELINE
FACTORY INFORMATION
Span
* NOT EVERY CRANE CAN BE A SINGLE GIRDER TYPE.
Single girder have been as build in span over 100 feet (~30.5m)
and the capacities over 100 tons. But typically cost effective
engineering dictates that single girder cranes be considered as
per this chart
OVERHEAD CRANE
GUIDELINE
OPERATING DATA
OPERATING
DATA
Capacity
Lifting heigh
Long of
traversing
Long of
travelling
Speed
Speed control
type
OVERHEAD CRANE
GUIDELINE
OPERATING DATA
Capacity
OVERHEAD CRANE
GUIDELINE
OPERATING DATA
Wire rope
OVERHEAD CRANE
GUIDELINE
OPERATING DATA
Speed
OVERHEAD CRANE
GUIDELINE
CONSTRUCTION
CRANE TYPE
GIRDER TYPE
Overhead
Single Girder
Monorail
Double Girder
END CARRIAGE
ON RUNWAY BEAM
Overhead
Suspension/Underhung
OVERHEAD CRANE
GUIDELINE
CONSTRUCTION
CONTROL TYPE
HOIST TYPE
HOOK TYPE
Chain
Normal
Control pendant
with cable
Wire rope
Safety hook
Remote control
POWER CALCULATION
MOTOR POWER OF HOIST (refer IS 3177-1999)
POWER CALCULATION
MOTOR POWER OF HOIST (refer IS 3177-1999)
POWER CALCULATION
MOTOR POWER OF TRAVERSER & TRAVELLING (refer IS 3177-1999)
For indoor crane:
For outdoor crane:
POWER CALCULATION
MOTOR POWER OF TRAVERSER & TRAVELLING (refer IS 3177-1999)
END
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