Polanik DC-250 User manual

Instruction manual
Competition throwing circle
DC-250
File: 2020-06-25
PRODUCT SUPPORT
Paweł Ciechanowski
p.ciechano[email protected]m

Instruction manual DC-250 2/5
Warning!
The product sensitive to impacts –handle with care!
Read this manual carefully before assembly and installation.
I. Use
The competition throwing circle is designed for installing in the foundation of the discus throwing facility.
II. Technical specification
[mm]
The producer reserves the right to introduce without warning changes in product constructions and colours.
Code
DC-250
Inside dia. [mm]
2500 ±5
Weight [kg]
41
Number of seg. [pcs]
4
Construction
galvanized steel segments screwed together with
8 blots, inside surface painted in white
IAAF certificate no.
E-05-0419
Packing
foiled and put on a pallet

Instruction manual DC-250 3/5
III. Assembly
Warning!
The product sensitive to impacts –handle with care!
Place the circle segments on a flat and even surface, next use included screws to screw the segments together only with
hands. Then check the diameter with a measuring tape in four points on the circle edge (at 12, 3, 6 and 9 o’clock), each
time if it is needed please move the segments to adjust the diameter to 2135 mm with allowance +/- 5 mm. Next tighten
the screws with wrenches. Finally check the diameter again.
Do not roll the assembled circle, it must be transported carefully to the place of the installation!
IV. Installation in concrete foundation
The assembled circle is to be embedded in the concrete foundation approx. 30 cm thick, made of concrete class C20/25,
and approximate diameter 2,9 m.
surface inside the circle
circle rim
target field surface
concrete
[mm]

Instruction manual DC-250 4/5
According to the rules (World Athletics Technical Rules Book C –C 2.1, Rule 32 and World Athletics Track and Field
Facilities Manual edition 2019:
a) the surface inside the circle shall be lower than the surface outside by 20 mm ± 6 mm,
b) it is recommended that brass pipes diameter 20 mm should be laid flush in 3-4 points (evenly distributed) near the
edge of the circle and they should be connected to the arena drainage system.
The efficiency of the throwing circle drainage depends upon the protection of the circle interior against dirt and sand.
The surface finish of the circle inside should be a little smoother for hammer throwing than for discus throwing. If the
circle is used both for discus and hammer throwing, the surface finish should be a compromise finish.
The circle installed in the throwing facility ready for use (see below).
V. Operation and maintenance
The circle surface and the surrounding area should be kept clean and protected against humidity, sand and dirt using a
special cover PC16-S0512 (available separately).

Instruction manual DC-250 5/5
VI. IAAF Certificate