The state architect s specifications published in 1992 stand as the legal criteria for adequate strapping of water heaters in california.
Water heater straps california.
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Strapping shall be at points within the upper one third and lower one third of its vertical dimensions.
Seismic straps cpc 507 2 water heaters require two seismic straps.
Basically the effective standards are these.
At a minimum any water heater shall be secured in accordance with the california plumbing code or modifications made thereto by a city county or city and county pursuant to section 17958 5.
Strapping must take place in the upper 1 3 and lower 1 3 of a tank type water heater not a tankless water heater.
The straps must be secured with screws at least 1 4 x 3 long and penetrate at least 1 5 into the wall studs.
One strap within the top 1 3 of the unit and the second strap within the bottom 1 3.
The bottom strap must be at least 4 inches above the water heater s controls.
Producers of water heaters must offer clear instructions for installation with seismic straps to be included with each unit sold.
Water heaters shall be anchored or strapped to resist horizontal displacement due to earthquake motion.
One located within the top 1 3 of the water heater unit and one at the bottom 1 3.
At the lowest point there should be a minimum of four inches clearance from the strapping to the controls.
Every water heater sold in the state of california must be braced.
If you live in california and have a larger tank water heater the state s architect s office requires that you have a third or even a fourth strap.
How to strap a water heater by golden gate ashi ggashi members brian cogley and paul rude demonstrate the proper way to strap a water heater.
Holdrite 360 80 gallon electric gas tank steel water heater strap kit.
The state architect must put together general installation instructions which include basic details showing the minimum standards for the application of earthquake strapping.