Section C Nonstructural Protective Measures Good House Keeping Restraints Removal.
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Transcript of Section C Nonstructural Protective Measures Good House Keeping Restraints Removal.
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Section CNonstructural Protective
Measures
Good House Keeping
Restraints
Removal
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Inertia Forces
DECELERATIONDECELERATION
ACCELERATIONACCELERATION
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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• 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 KeepingMove heavy items to lower shelves
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Good House KeepingKeep Counter-tops clean
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Good House KeepingKeep Hallways Clear
Wheels
Unrestrained TV
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Good House KeepingStore 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 MeasuresRestraining 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
• bolts
• 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
DECELERATIONDECELERATION
ACCELERATIONACCELERATION
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Break in Load Path
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Anchor to wall: Use Stud FinderHold still against wall to calibrate before moving
Partition wall Steel Frame
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Steel Framed StructureRestraining strap attachedto the refrigerator with anadhesive 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 attachedon top to a steel beam.
Initially the partition wall wasthought to be a fire wall becausestairs were behind this wall.From attic could see that thewall was not a firewall.
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Restraining book shelves
Make overheads of details in Section C of theNonstructural Protection Guide. Use to discussthe installation recommendations, common attachmentproblems, types of anchors that might be needed, etc.
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Masonry Partition WallIssues: 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 Trainingto Building Contractors and Inspectors)
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MustCarefully Clean the
Hole
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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MustBlow Out the Fines
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Need proper edge distanceImproper Edge Distance in Concrete
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Anchor to concrete floorCautions: prestressed concrete, wires
FEMA
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Photo: FEMA
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TV anchored to wallAdditional strap secures to platform
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Hazardous MaterialsRestrain to prevent falling from shelf
Photo: FEMA
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ShelfStorageRestraints
Photo: FEMA
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Mechanical - Braced PipingSMACNA Seismic Bracing Standards
Photo: FEMA
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Hazardous MaterialsGas Cylinder Restraints
Note bottomrestraint isrequired
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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BracedWater Heater
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Pre-Packaged Bracing System
Must be elevated in garage
FlexibleConnector
(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)
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Flexible connection
Pad anchored into floor
Small boiler
Photo: City of Bellevue
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Automatic Shut-Off ValveInstalled on owner’s side of the gas meterGenerally installed by private contractor, not gas company.
Shut off valve
Owner’s side of meter
FEMA