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Published byElfrieda Richardson Modified over 9 years ago
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Section C Nonstructural Protective Measures
Good House Keeping Restraints Removal
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Inertia Forces ACCELERATION DECELERATION
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Desk Top Equipment Unrestrained item falls to floor
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Furnishings and Equipment Unrestrained shelves overturn
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Good House Keeping Location Clean-up
Move tall, heavy elements away from exit doors and seating areas Move items over 5 pounds to lower shelves Clean-up Keep counter-tops and hallways picked up Store chemicals safely
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Good House Keeping Move heavy items to lower shelves
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Good House Keeping Keep Counter-tops clean
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Good House Keeping Keep Hallways Clear
Unrestrained TV Wheels
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Good House Keeping Store heavy items in lower drawers Latch drawers
Good House Keeping Store heavy items in lower drawers Latch drawers. Locate away from exits.
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Restrain nonstructural elements
Desktops and counter-tops Walls Floors Shelves
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Restrain Desktop Equipment to table: thumb locks and quake pads
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Protective Measures Restraining nonstructural elements
Identify where wall floor ceiling Identify material wood masonry concrete shear wall reinforced concrete precast concrete concrete block steel Structural System frame, precast, block Select connector type Wood lag screws bolts Metal sheet metal screws Concrete expansion anchors adhesive anchors
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Anchoring to a wall requires the formation of a complete load path
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Inertia Forces ACCELERATION DECELERATION
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Break in Load Path
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Anchor to wall: Use Stud Finder
Hold still against wall to calibrate before moving Partition wall Steel Frame
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Steel Framed Structure
Restraining strap attached to the refrigerator with an adhesive and to the structure with a heavy gauge metal screw. The partition wall behind the refrigerator is wall board all the way across the room. The partition wall is attached on top to a steel beam. Initially the partition wall was thought to be a fire wall because stairs were behind this wall. From attic could see that the wall was not a firewall.
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Restraining book shelves
Make overheads of details in Section C of the Nonstructural Protection Guide. Use to discuss the installation recommendations, common attachment problems, types of anchors that might be needed, etc.
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Masonry Partition Wall Issues: capacity of the wall
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Special retrofit anchors may be needed
Drilled-in anchors Mechanical Adhesive (poor quality concrete, masonry, brick) Common installation errors Failure to follow manufacturer’s installation instructions Inadequate hardware substitutions
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Installing Mechanical Anchors
Concrete must be in good shape Minimum edge distance must be maintained Use required torque and calibrated torque wrench (Photo: FEMA Seismic Retrofit Training to Building Contractors and Inspectors)
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Must Carefully Clean the Hole
(Photo: FEMA Seismic Retrofit Training to Building Contractors and Inspectors)
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Must Blow Out the Fines (Photo: FEMA Seismic Retrofit Training
to Building Contractors and Inspectors)
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Need proper edge distance Improper Edge Distance in Concrete
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Anchor to concrete floor Cautions: prestressed concrete, wires
FEMA
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Photo: FEMA
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TV anchored to wall Additional strap secures to platform
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Hazardous Materials Restrain to prevent falling from shelf
Photo: FEMA
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Shelf Storage Restraints Photo: FEMA
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Mechanical - Braced Piping SMACNA Seismic Bracing Standards
Photo: FEMA
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Hazardous Materials Gas Cylinder Restraints
Note bottom restraint is required Photo: FEMA
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Water Heaters Tip easily during earthquakes
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Braced Water Heater (Photo: FEMA Seismic Retrofit Training
to Building Contractors and Inspectors)
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Pre-Packaged Bracing System
(Photo: FEMA Seismic Retrofit Training to Building Contractors and Inspectors) Flexible Connector Must be elevated in garage
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Small boiler Flexible connection Pad anchored into floor
Photo: City of Bellevue
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Automatic Shut-Off Valve Installed on owner’s side of the gas meter Generally installed by private contractor, not gas company. Shut off valve Owner’s side of meter FEMA
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