Earthquake Preparedness

Because we live in an area with periodic seismic activity, it is important that every homeowner take the necessary steps protect their family and property.
The following are some of the basics of earthquake preparedness that we can help you complete.

Strap Water Heater

The average water heater weighs about four hundred pounds when full. Such a massive object resists being moved suddenly, so in an earthquake, the heater tends to topple, breaking the gas and water lines connected to it. Current codes require that the water heater be no more than 12" and no less than 1" from the nearest straight wall. Code requires that perforated steel plumbers tape be wrapped around the heater and anchored to a stud in the wall to help stabilize the heater in a seismic event. In some instances where the water heater is located in the middle of the room framing will have to be connected to the floor joists of the room above and then the water heater is strapped into this new framing. Code also requires that flexible water and gas connections be installed along with pressure relief and temperature control valves.

Anchor large appliances and furniture to the wall

Large appliances and top-heavy pieces of furniture will move in an earthquake blocking doorways and making it difficult to leave the building. HDR Remodeling will brace the washer, dryer, refrigerator, cabinets and bookshelves to the wall as a way of reducing shifting and toppling of these items.

Bolt and Shear wall

The building codes at the time that your home was built may not have required shear walls and foundation bolting in this "weak story" of the home. This puts your house at significant risk of damage in an earthquake. In most cases, the following is required to bring the infrastructure of your home up to current building standards:

  • Anchor the mud sill to the foundation using threaded rod anchor bolts set in epoxy embedment about every 6 feet in accessible areas
  • Add hold downs where required at the termination of most shear wall segments.
  • Add blocking between studs where needed for proper nailing of plywood
  • Install plywood diaphragm with proper nailing pattern
  • Install additional blocking where pipes or ducts pass through the shear walls
  • Install vent holes and covers in top and bottom of each bay

This work must be done with permits and inspected and approved by the city building department. Depending on the type of structure and foundation, engineering may be required to ensure adequate reinforcement.

Useful web sites about Emergency Preparedness:

National Association of The Remodeling Industry
Build It Green
Sierra Club Green Home
The National Kitchen and Bath Association
Click to verify BBB accreditation and to see a BBB report for HDR Remodeling
Contractors State Licensing Board
National Chimney Sweep Guild
Rebuilding Together Oakland County