# LIGHTNING PROTECTION OF A HORSE-RIDING ARENA

The ZANDZ Technical Center performed lightning protection calculations for a horse-riding arena located on the territory of a sports and recreation complex. Livestock buildings necessarily require the right lightning protection system. In accordance with table 1 of AD 34.21.122.-87 they must be protected according to category III. In accordance with IS 153-34.21.122-2003, the object refers to ordinary with protection level III, the reliability of protection is 0.9.

Thanks to the designed lightning protection system, the horse-riding arena together with the animals and people inside will be reliably protected. Find out more from the news text.

To calculate lightning protection of a horse-riding arena.

## Solution

Calculations of lightning protection are made in accordance with the following documents:

Lightning arresters are used for protection of structures from lightning strikes. A lightning arrester usually consists of a lightning rod, intercepting the lightning strike, a down conductor and a ground electrode. All these elements allow to safely drain lightning current into the ground without a damage for the protected object.

## Description of the external lightning protection system of the horse-riding arena

The set of measures to provide the required lightning protection is offered by the following solutions:

1. Installation of 6 rod lightning rods 10 m high, mounted to the wall. It was taken into account that 2 m of the height of the air terminal is taken for fixation.
2. The metal frame of the building is used as a down conductor in accordance with clauses 1.6 and 2.12 of the AD.
3. Down conductors are laid from copper-bonded wires with the diameter of 8 mm, which are mounted on the roof to vertical surfaces using зажимов GL-11703A clamps and connected to a metal frame using clamps зажимов ZZ-005-064.

The set of measures on the provision of the necessary requirements to the grounding device is presented by the following solutions:

1. Installation of a grounding device consisting of a horizontal electrode (galvanized tape with the cross-section of 4x30 mm), 0.5 meter deep, laid as a contour around the building 1 m from the walls.
2. In accordance with clause 2.13 of the AD, a contour without installation of vertical electrodes is enough.
3. The connection of horizontal electrodes with each other, as well as with columns at least 20 m around the perimeter, is carried out using clamps ZZ-005-064.

The layout of elements in the lightning protection system and the grounding device is shown in Figure 1. Protection zone corresponds to the reliability 0,9 of IS.

Figure 1. Plan with the layout of lightning protection elements and grounding device

## Accessories for lightning protection of a horse-riding arena

Table 1 - List of material needs

 № Fig. Product item Product Quantity Lightning protection system 1. ZZ-201-010-3 ZANDZ Vertical air-terminal mast 10 m high with a set of 3 fastenings to the wall (stainless steel) 6 2. ZZ-202-002 ZANDZ Clamp to the lightning rod D42 mm for down conductors (stainless steel) 6 3. ZZ-502-008-62,5 ZANDZ steel galvanized wire (D 8 mm / S 50 mm²; coil of 62,5 m 1 4. GL-11703A GALMAR Clamp to the facade / wall for a down conductor with elevation (15 mm high; painted galvanized steel) 30 Grounding device 5. ZZ-005-064 ZANDZ Clamp for connecting conductors (up to 40 mm) 40 6. ZZ-502-304-52 ZANDZ steel galvanized tape (30*4 mm; coil of 52 m 6 7. ZZ-007-030 ZANDZ Waterproof tape 4

Do you have any questions on calculation of lightning protection for a horse-riding arena? Please contact our ZANDZ Technical center!