Crane capacity upgradation can save over 50% of
cost as compared to replacement of existing crane by new. However, Crane
upgradation needs high degree of understanding of crane design and
analytical ability to carry out accurate reverse engineering. In most of the
cases manufacturing drawings of existing crane are not available with the
crane user and in such a situation detailed study of existing crane is
essential to determine its suitability for capacity/ span upgradation.
Study of Crane Operation to determine duty cycle, Crane audit, Visual
observation, dimensional verification, NDT testing of plates to determine
residual thickness of load bearing structures, measurement of speeds of
Hoist, CT and LT motions, measurement of motor currents, measurement of
crane girder deflection under load and analysis of structures using
computerised software such as STAAD & ANSYS are some of the technique
that we employ to determine whether the crane is suitable for upgradation.
We also undertake upgradation of complete electrical system of crane. This
may include replacement of slipring motors by Sq Cage motors with VVVF
Control, provision of compact festoon cable system/ drag chain in place of
open wire system for trolley power supply, replacement of Angle Type DSL/
open wire DSL by Shrouded Bus bars, Changing of Electrical Cables and
Installation of Electronic Load weighing system/ Overload limiter on Crane.
Our design team has hands on experience of designing cranes for wide range
of application ranging from Workshop duty, Power Plant, Cement Plant,
General Engineering to Steel Mill duty. Our team has designed Ladle Handling
Cranes, Magnet Cranes, Grab Bucket Cranes, Tong Cranes, Rotating Beam Crane
up to 500 MT Capacity. Our head of Design has more than 40 years of
experience in Design of EOT and Gantry Cranes.