(English) Gas cylinders, Water tank

Stakeholder	Life safety	Property loss	Functional loss
Solution/ Expertise	Repair time	Costs of strengthen

Typical causes of damages

Unsecured cylinders or tanks, including oxygen and compressed air tanks, may fall over and damage the shut-off valve, releasing hazardous or flammable contents.

A tank with a damaged shut-off valve may result in the tank or valve becoming a projectile.

Unsecured cylinders may fall over, striking or rolling and striking nearby occupants.

Recommended methods

All compressed gas cylinders must be secured individually to a solid structural member with 4 mm welded chain or equivalent bracing. At least one chain must be used to secure each cylinder at a point two-thirds up the cylinder’s height. C-clamp bench attachments and fiber/web strap attachments will not be allowed.

source: http://homebuysblog.com/simi-valley-earthquake-preparedness-water-heater-bracing/