The surface finish to the concrete circle is slightly smoother for hammer throwing than for discus throwing. The circle for the hammer throw is slightly smaller than the discus throw. It is usually combined with the facility for discus throw. The hammer throw facility includes a throwing circle, a protective cage and a landing sector. Its angle of 34.92 degrees will be attained if the two sector lines at a distance of 80m are spaced 48m apart.

The landing sector is laid from the middle of the circle with an angle of 34.92 degrees and marked by 0.05m wide white lines, the inside edges which form the boundary of the sector. The landing surface must not allow the implement to bounce backwards, thus creating a risk that the measuring point is obliterated. The landing sector consists of cinders or grass or other suitable material with an even surface soft enough to ensure that the place of the initial fall of the implement can be clearly established by the judges. To provide greater safety it is desirable to extend the netting on the side of the cage nearer to the track further than 7m from the centre of the circle and/or increase the height of the netting for the last 2m. In those instances the higher standards required for hammer throwing apply to the protective cage design. Safety cageįrequently discus and hammer are thrown from a combined facility. The interior of the circle is constructed of concrete and must not be slippery.įurther information on the construction of the throwing circle is in Section 2.4.1.2 of the Manual, page 59. The throwing circle is made of band iron, steel or other suitable material, the top of which is flush with the ground outside or the synthetic surface or concrete surround. If two separate discus and hammer circles are placed within the hammer protective cage then the discus throw circle is the circle closer to the landing sector. The protective cage must meet the more stringent requirements for hammer throwing. The facility for discus throw, near the 1500m start, is usually combined with a facility for hammer throw.Discus-throw-circle-facility The only difference is the diameter of the throwing circle is 2.50m for discus throw and 2.135m for hammer throw.

They are located near the ends of the back straight and the landing sector is located in the grass area inside the track. The discus throw includes a throwing circle, protective cage and landing sector.

Discus track and field