APRIL 2017 | P R O J E C T O F T H E M O N T H P R O J E C T O F T H E M O N T H | APRIL 2017

6 | April 2017 | www.hoistmagazine.com www.hoistmagazine.com | April 2017 | 7

FULL BEAMAn Indonesian manufacturer of pre-stressed concrete beams has installed 16 CXT overhead cranes from Konecranes to optimise production at its plant in Surabaya.

PT Waskita Beton Precast

(WSBP) has a target capacity

of around 3.25m tonnes of

concrete beams this year,

which will be used for construction and

infrastructure projects, including flood

mitigation structures, maritime piling

and structures, as well as road, rail

bridge, and civil engineering works.

The company worked with Konecranes

and Konecranes’ East Java agent PT

Jakarta Prima Cranes (JPC) to install

16 CXT cranes. The cranes feature full

inverter control, for speed, safety and

precision, and log travel speeds of 100m

a minute to increase efficiency.

The cranes are a combination of single

and double girder types, with capacities

of 8–10t, and feature tandem operation

where required for hoisting wide, long

and heavy concrete and steel loads.

The precision modelling, specification

and engineering involved in preparing for

the installation was overseen by a global

collaboration between WSBP’s parent

company PT Waskita Karya (Persero)

Tbk, led by the plant manager of WSBP’s

Sidoarjo plant Bidaruni Anggarawati, with

JPC’s on-site personnel and Konecranes

SEA operation extensively supported by

engineers at Konecranes’ head office in

Finland.

The new installation of Konecranes

replaced slower and less efficient mobile

cranes used as an interim measure since

the Surabaya plant opened a year ago.

JPC sales manager Siat Tjie Djiang said:

“Obviously when you are handling long

and heavy beams—6–20m, weighing

3–15t—safety is a top priority. Not only

must any risk of collision be curtailed,

but also the process must be robustly

engineered to continue to reliably

provide an uninterrupted supply to vital

infrastructure projects.

“Because reliability is essential, PPC

and Konecranes spent more than two

months partnering with the customer,

settling all the technical specifications

and design criteria. This meant we were

able to supply Konecranes’ latest proven

lifting technologies complete with

suitable statutory compliance, technical

and design requirements based on actual

usage.

“We believe this is the first-ever

successfully installed full inverter

control system with 100m/min long

travel speeds, coupled with anti-sway

technology and comprehensive safety

devices for precast applications.

“All 16 cranes incorporate inverter

control for smoother travelling motion,

meaning better load control compared to

one- or two-speed contactor control. All

lift, cross travel and long travel speeds

are tailored to the exact application.”

Safety devices also include overload

protection, upper/lower limit switch,

cross travel and long travel limit switch,

anti-collision devices and thermal

protection for the motors. ●

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