FIELD OF INVENTION
The present invention relates to a method of proof load testing of heavy equipment
vertical handling structural using an equalizer beam with multi overhead cranes in
different capacities.
BACKGROUND OF INVENTION
The Heavy equipment to be lifted weighs 215 tons having a height of 24m and the
same will be handled at site in a height 80m from ground level during erection. Since,
the equipment cost is very high, the equipment vertical handling structure will be
checked at least 1.5times higher than actual weight of equipment before welding /
assembling with equipment.
To meet the above requirements, the equipment handling Structural attachment and
Evener Beam separately load tested before welding / assembling with Heavy
equipment. For proof load testing of Structural attachment and Evener Beam
individually, the dead weight of 325Tons has been used. This will ensure the structural
integrity of handling Structural attachment and Evener Beam. Once, the above test is
completed, it will create the confidence level of handling capacity for Structural
attachment and Evener Beam before welding with equipment.

To meet the above object, a equalizer beam is designed and fabricated. Design and
fabrication of Equaliser Beam to verify the Structural integrity of Heavy equipment
vertical handling structural (Structural attachment and Evener Beam) under Static load
as well as dynamic load of 325Ton using multiple overhead crane. After load testing,
the Structural attachment will be integrated with Heavy equipment by full penetration
weld. The Evener Beam one end will be connected to Structural attachment and other
end will be connected to handling crane at site. Since, the Heavy equipment will be
handled in vertical position nearly 80m height from ground level at site, any failure in
system will call for huge damage on Heavy equipment.
OBJECTS OF THE INVENTION
Therefore, it is an object of the invention to propose a method of proof load testing of
heavy equipment vertical handling structural using an equalizer beam with multi
overhead cranes in different capacities which is capable of proving the structural
integrity of structural attachment and Evener Beam to be used for lifting the Heavy
equipment at site to a height of 80m.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWING
Figure 1 – shows an equalizer beam designed and fabricated for proof load testing of
heavy equipment handling structural attachment and Evener Beam.

Figure 2 - shows proof load testing of heavy equipment handling structural
attachment using equalizer beam.
Figure 3 - shows proof load testing of heavy equipment handling Evener beam using
equalizer beam.
Figure 4 - shows the arrangement of structural attachment as well as Evener Beam
in assembled condition with equipment.
DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE
INVENTION
As shown in figure-1, the Equaliser Beam (01) is a single welded structure which is
made from structural steel plates. The thickness of plate has been decided based on
lifting load weight. Since, the Equaliser Beam is subjected to cyclic loading, all plates
are qualified to meet the minimum Impact energy requirements. The Equaliser Beam is
nothing but a beam in rectangular cross section. All weld joints are qualified to through
Magnetic Particle Inspection. The stiffeners are provided at suitable distance at inside of
Equaliser Beam to avoid the bending of Equaliser Beam during proof load testing. It has
multiple holes at various locations. The hole locations, the suitable thickness stiffeners
are provided. The holes provided on middle of Equaliser Beam is used to connect the
downward loading point. The holes are provided on left side of Equaliser Beam is used

to connect the higher capacity overhead crane of 300Ton. The holes provided on right
side of Equaliser Beam is used to connect the lower capacity overhead crane of 150Ton.
The lifting loading point on Equalise bean is located based on crane capacities i.e. the
loading point is fixed towards higher capacity overhead crane side. The hole size on
Equaliser Beam is decided to suit the pin outer diameter with tight tolerance to ensure
the proper engagement of pin. Both side of Equaliser Beam are closed by end cover
plate.
a) Proof load testing of Heavy equipment handling structural attachment (06) using
Equaliser Beam:
As shown in figure-2, the Equaliser Beam’s (01) left side is connected to higher capacity
overhead crane using link-1 (02) and pin-1 (03). The right of Equaliser Beam is
connected to lower capacity crane using link-1 (02) and pin-1 (03). The link-1 one is a
plate which has two hole at both ends to facilitate the connection between overhead
crane and Equaliser Beam. The pin-1 is made from circular shape rod of alloy steel
which has threads at both end to lock the link-1 from jerking during load testing. The
loading point of Equaliser Beam connected to structural attachment (06) using link-2
(04) and pin-2 (05). The other side of structural attachment (06) is connected to dead
load (07) using link-3 (08) and pin-3 (09).
b) Proof load testing of Heavy equipment handling Evener Beam (10) using Equaliser
Beam:

As shown in figure-3, the Equaliser Beam’s (01) left side is connected to higher capacity
overhead crane using link-1 (02) and pin-1 (03). The right of Equaliser Beam is
connected to lower capacity crane using link-1 (02) and pin-1 (03). The link-1 one is a
plate which has two hole at both ends to facilitate the connection between overhead
crane and Equaliser Beam. The pin-1 is made from circular shape rod of alloy steel
which has threads at both end to lock the link-1 from jerking during load testing. The
loading point of Equaliser Beam connected to Evener Beam using link-2 (04) and pin-2
(05). The other side of Evener Beam (10) is connected to dead load (07) holding from
using link-3 (08) and pin-3 (09).
The Structural attachment and Evener Beam separately load tested before welding /
assembling with Heavy Weight Equipment. The typical arrangement of Structural
Attachment as well as Evener Beam assembled condition with equipment is shown in
fig.4.

WE CLAIM
1. A method of proof load testing of heavy equipment vertical handling structural using
an equalizer beam with multi overhead cranes in different capacities, the said
method comprising the steps of;
providing an equalizer Beam (01) for facilitating load testing of structural attachment
and Evener beam to proof the structural integrity;
arranging a structural attachment (06);
arranging a Evener beam (10);
disposing link-1(02), pin-1(03), link-2(04), pin-2(05), link-3(08) and pin-3(09);
providing a dead load (07); wherein,
left side of the equalizer beam (01) is connected to a higher capacity overhead
crane usinglink-1(02) and pin-1(03) and right side of the said beam (01) is
connected to a lower capacity crane using link-1(02) and pin-1(03) wherein the
equalizer beam is connected to structural attachment (06) using link-2(04) and pin-
2(05) when the other side of structural attachment is connected to dead load (07)
using link-3(08) and pin-3(09) wherein a similar process is carried on with the load
testing of Evener beam (10) using the equalizer beam (01) when the equalizer beam
(01) is connected to the Evener beam (10) using link-2(04) and pin-2(05) and the
other side of Evener beam (10) is connected to dead load (07) through link-3(08)
and pin-3(09) wherein after successful load testing, the structural attachment (06) is

integrated with heavy equipment by full penetration weld when one end of the
evener beam (10) is connected to the structural attachment and other end to crane
at site.
2. The method as claimed in claim 1, wherein the higher capacity overhead crane is
300 Ton and the lower capacity overhead crane is 100 Ton.