section c nonstructural protective measures good house keeping restraints removal

Section CNonstructural Protective

Measures

Good House Keeping

Restraints

Removal

Inertia Forces

DECELERATIONDECELERATION

ACCELERATIONACCELERATION

Desk Top Equipment Unrestrained item falls to floor

Furnishings and Equipment Unrestrained shelves overturn

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

Good House KeepingMove heavy items to lower shelves

Good House KeepingKeep Counter-tops clean

Good House KeepingKeep Hallways Clear

Wheels

Unrestrained TV

Good House KeepingStore heavy items in lower drawers

Latch drawers. Locate away from exits.

Restrain nonstructural elements

Desktops and counter-tops

Walls

Floors

Shelves

Restrain Desktop Equipment to table: thumb locks and quake pads

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

Anchoring to a wall requires the formation of a complete load path

Inertia Forces

DECELERATIONDECELERATION

ACCELERATIONACCELERATION

Break in Load Path

Anchor to wall: Use Stud FinderHold still against wall to calibrate before moving

Partition wall Steel Frame

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.

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.

Masonry Partition WallIssues: capacity of the wall

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

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)

MustCarefully Clean the

Hole

(Photo: FEMA Seismic Retrofit Trainingto Building Contractors and Inspectors)

MustBlow Out the Fines


Need proper edge distanceImproper Edge Distance in Concrete


Anchor to concrete floorCautions: prestressed concrete, wires

FEMA

Photo: FEMA

TV anchored to wallAdditional strap secures to platform

Hazardous MaterialsRestrain to prevent falling from shelf

Photo: FEMA

ShelfStorageRestraints

Photo: FEMA

Mechanical - Braced PipingSMACNA Seismic Bracing Standards

Photo: FEMA

Hazardous MaterialsGas Cylinder Restraints

Note bottomrestraint isrequired

Photo: FEMA

Water Heaters Tip easily during earthquakes


BracedWater Heater


Pre-Packaged Bracing System

Must be elevated in garage

FlexibleConnector


Flexible connection

Pad anchored into floor

Small boiler

Photo: City of Bellevue

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

section c nonstructural protective measures good house keeping restraints removal

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