# Lightning protection of a local history museum in the Altay region

We received a request to calculate the lightning protection of the «Altai State Museum of Local History». This is not the first monument of architecture, history and culture, which is calculates by the ZANDZ Technical Center. You can recall the «The Maly theatre of Russia» and «Historical object – the mansion», news about the lightning protection of which we published on the site ZANDZ.com.

Having a rich and successful experience in designing lightning protection of architectural monuments, we reacted to the lightning protection of the local history museum with full responsibility. Lightning rods and down conductors were located in accordance with the design features of the building, so as not to spoil the appearance, but maintaining high reliability of protection.

Check out the lightning protection solution of the "Altai State Museum of Local History" from our news.

## Solution on the museum lighting protection

Calculations of the museum lightning protection were performed in accordance with the following documents:

Lightning arresters are used to protect structures from lightning strikes. A lightning rod consists of a lightning rod, intercepting a lightning discharge, a down-conductor and a grounding conductor. All these elements allow you to safely divert the lightning current to the ground without damage to the protected object.

The local history museum belongs to the ordinary objects in terms of lightning protection in accordance with the IS and the 3rd category according to the AD.

## Description of external lightning protection system and grounding of the museum

The complex of measures to ensure the necessary requirements for the lightning protection system is represented by the following solutions:

1. Installation of five rod lightning rods with a height of 2 m on the ridge.
2. Installation of five 1.5 m high rod lightning rods on the pipe. It is taken into account that 0.5 m of the rod length goes to the mount.
3. Lightning rods are interconnected to organize two down conductors using copper bonded wire D = 8 mm from each lightning rod. Down conductors are attached to an artificial ground electrode. Fastening of down conductors is made (installation step 0.6-1 m):
4. Connection and branching of the down conductors is performed using GL-11551А clamps.

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

1. Installation of a grounding device consisting of a horizontal electrode (copper bonded tape with the cross-section of 4x30 mm), depth of 0.5 meters and 7 vertical electrodes (pins of copper bonded steel with a diameter of 14 mm) 3 m long.
2. Connection of vertical and horizontal electrodes with each other is carried out with the help of ZZ-005-064 clamp.
3. The connection of the down condcutor with the output of the copper-bonded tape from the ground is carried out using GL-11562A control clamp.
4. The design of the grounding device corresponds to clause 1.7.55 of the EIC. Grounding devices for protective grounding and grounding for lightning protection are carried out in common.

Arrangement of lightning protection system and grounding device elements are shown in Figure 1. The zone shown corresponds to Zone B of AD.

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

## Components for lightning protection and grounding of the museum

 № Product item Name Q-ty, units Lightning protection system 1. GL-11521SS GALMAR Lightning rod 2 m high for installation in threaded holders (М16; stainless steel) 5 2. GL-11525 GALMAR Ridgy holder for a lightning rod (thread M16; down conductor connection d10 мм; bronze) 5 3. GL-21134 GALMAR Air-terminal mast (1,5 meters; for vertical surfaces; galvanized steel 5 4. GL-11149-50 GALMAR Copper bonded steel wire (D8 мм; coil of 50 meters) 4 5. GL-11149-20 GALMAR Copper-bonded steel wire (D8 мм; coil of 20 meters) 2 6. GL-11564A GALMAR Clamp on the ridge for down conductor fastening (height up to 15 mm; painted galvanized steel) 120 7. GL-11747A GALMAR Clamp on the roof covered with metal profile/ profiled sheeting, for down conductor (painted galvanized steel) 4 8. GL-11545A GALMAR Clamp on a gutter for down conductor (painted galvanized steel) 30 9. GL-11514N GALMAR Clamp on a gutter for a down conductor (tinned copper tape + clamp of stainless steel) 70 10. GL-11551A GALMAR Clamp for connecting down conductors (painted galvanized steel) 10 11. GL-11562A GALMAR Control clamp for connecting down conductors wire+tape (painted galvanized steel) 7 Grounding device 12. ZZ-005-064 ZANDZ Clamp for connecting conductor (up to 40 mm) 10 13. GL-11075-50 GALMAR Copper-bonded tape (30*4 mm / S 120 mm²; coil of 50 meters) 3 14. GL-11075-10 GALMAR Copper-bonded tape (30*4 mm / S 120 mm²; coil of 10 meters) 1 15. ZZ-001-065 ZANDZ Copper-bonded threaded grounding rod (D14; 1,5 m) 14 16. ZZ-005-064 ZANDZ Threaded connecting coupling 8 17. ZZ-003-061 ZANDZ Starting tip 7 18. ZZ-004-060 ZANDZ Driving head for a breaker hammer 3 19. ZZ-006-000 ZANDZ Conducting grease 1 20. ZZ-007-030 ZANDZ Waterproof tape 3 21. ZZ-008-000 ZANDZ Head for a breaker hammer (SDS max) 1

Do you have questions on grounding and lightning protection of a museum? Ask ZANDZ Technical Center for help!