MEET THE DBI PROS “Meet the DBI Pros" Summit October 11, 12, 2007 Isam Hasenin, P.E., C.B.O,...
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Transcript of MEET THE DBI PROS “Meet the DBI Pros" Summit October 11, 12, 2007 Isam Hasenin, P.E., C.B.O,...
MEET THE DBI PROS
““Meet the DBI Pros" SummitMeet the DBI Pros" SummitOctober 11, 12, 2007 October 11, 12, 2007
Isam Hasenin, P.E., C.B.O, DirectorIsam Hasenin, P.E., C.B.O, Director
RESIDENTIAL EARTHQUAKE PREPAREDNESS
MEET THE DBI PROS
Residential Earthquake Residential Earthquake PreparednessPreparedness
Joe Duffy, Senior Building Inspector/DBIJoe Duffy, Senior Building Inspector/DBI Howard Zee, Structural Engineer/DBI Howard Zee, Structural Engineer/DBI
Plan Check ServicesPlan Check Services
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Earthquake PreparednessEarthquake Preparedness
Presented by Joe Duffy & Howard Zee - San Francisco Department of Building Inspection DBI Summit October 11,12, 2007
MEET THE DBI PROS
Marina photo1 Marina photo1
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Marina photo2Marina photo2
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Marina photo3Marina photo3
MEET THE DBI PROS
PERSONAL PERSONAL PREPAREDNESSPREPAREDNESS
Make your family and home as safe as possible.
www.72hours.org
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Develop a Family Emergency PlanDevelop a Family Emergency Plan Locate safe shelter Locate safe shelter
areas in your home areas in your home Identify places to store Identify places to store
emergency supplies emergency supplies Arrange where to meet after a Arrange where to meet after a
disaster disaster Establish a distant phone Establish a distant phone
contact (a distant aunt?)contact (a distant aunt?)
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Home Work Vehicles Transportable
Assemble and Maintain Assemble and Maintain Emergency SuppliesEmergency Supplies
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Shoes – sturdy, with socks
Crowbar
Leather work gloves
Flashlight w/batteries
Cash, ID, cell phone
Your “Grab & Go” Bedroom KitYour “Grab & Go” Bedroom Kit
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ATM, credit cards
Essential medication and eye glasses
Whistle Scissors Watch or clock
““Grab & Go” ItemsGrab & Go” Items
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Unopened store-bought drinking water – check expiration date
Stored tap water should be purified before using it
Store in cool, dark place secure from animals and easy to get to
Water – MinimumWater – Minimum1 gallon/person/dayx51 gallon/person/dayx5
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1 Gallon per person per day 1 Gallon per person per day
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Home/transportable suppliesHome/transportable supplies Water purification kitWater purification kit First aid kit and instruction bookFirst aid kit and instruction book Antiseptic wipes or baby wipesAntiseptic wipes or baby wipes Foods requiring little heat or waterFoods requiring little heat or water Can opener, eating utensilsCan opener, eating utensils Toilet paper and personal hygiene itemsToilet paper and personal hygiene items Butane barbeque/fireplace igniter or matchesButane barbeque/fireplace igniter or matches Large garbage bags, duct tape, utility knifeLarge garbage bags, duct tape, utility knife
MEET THE DBI PROS
more home/transportable supplies…more home/transportable supplies… Battery-operated radio, spare batteriesBattery-operated radio, spare batteries Flashlights, spare batteries, and bulbsFlashlights, spare batteries, and bulbs Blankets for all family membersBlankets for all family members Warm clothesWarm clothes Diapers, if neededDiapers, if needed Pet food, leash, and carrier, if neededPet food, leash, and carrier, if needed Tent, sleeping bagsTent, sleeping bags Backpacks to carry emergency suppliesBackpacks to carry emergency supplies
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UtilitiesUtilities Natural GasNatural Gas WaterWater ElectricityElectricity
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UtilitiesUtilitiesTrain family to turn off utilities,
but turn it off
ONLY if necessary
(or if not sure)
MEET THE DBI PROS
Natural GasNatural Gas Teach children to identify Teach children to identify
the smell of gas (rotten the smell of gas (rotten eggs)eggs)
Turn off gas if you smell Turn off gas if you smell leaks, or if you are unsureleaks, or if you are unsure
Turn off gas if your meter Turn off gas if your meter wheels are spinningwheels are spinning
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Call PG&E to turn gas back onCall PG&E to turn gas back onDo not turn gas back on Do not turn gas back on
yourselfyourself
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Natural GasNatural Gas
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WaterWaterTurn off water if house is flooding or if water is contaminated
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Shut off Water, IF necessaryShut off Water, IF necessary Locate water Locate water
shutoffshutoff Insert tool in hole Insert tool in hole
& remove cover& remove cover Turn water OFFTurn water OFF
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Home Preparedness StructuralHome Preparedness Structural Structural evaluation by architect Structural evaluation by architect
or engineer or engineer Seismic upgrade/retrofitSeismic upgrade/retrofit Meets Code requirementsMeets Code requirements
Do-it-yourself strengtheningDo-it-yourself strengthening Improves strength, but it’s NOT a Improves strength, but it’s NOT a
seismic upgrade/retrofitseismic upgrade/retrofit Not as good, but better than nothingNot as good, but better than nothing
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Seismic Upgrade or Seismic RetrofitSeismic Upgrade or Seismic Retrofit Building permit required for voluntary Building permit required for voluntary
seismic upgrade/retrofit per SFBC seismic upgrade/retrofit per SFBC 3403.6, 1605.4 and 1605.4.33403.6, 1605.4 and 1605.4.3
Engineered design by architect or Engineered design by architect or engineerengineer
Civil engineer or structural engineerCivil engineer or structural engineer Fee: a few thousand $ up to much moreFee: a few thousand $ up to much more It’s a It’s a seismic upgrade / seismic retrofitseismic upgrade / seismic retrofit
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Do-it-yourself Voluntary Do-it-yourself Voluntary Strengthening Strengthening
No drawings required, but must get a No drawings required, but must get a building permitbuilding permit
Engineer’s stamp not requiredEngineer’s stamp not required Architect’s stamp not requiredArchitect’s stamp not required It’s NOT a seismic upgrade or retrofit It’s NOT a seismic upgrade or retrofit
MEET THE DBI PROS
Description of work: Description of work: ““voluntary strengthening work voluntary strengthening work to add anchor bolts and to add anchor bolts and plywood at lowest story, etcplywood at lowest story, etc””
Residential Permit Counter Residential Permit Counter (1(1stst floor) floor)
No drawings, architect, or No drawings, architect, or engineer requiredengineer required
Over-the-counter permit Over-the-counter permit approvalapproval
It’s NOT a “It’s NOT a “seismic upgrade seismic upgrade or retrofit”, or retrofit”, it’s a “it’s a “voluntary voluntary strengtheningstrengthening”.”.
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General Guidelines and Tips for General Guidelines and Tips for ““Voluntary StrengtheningVoluntary Strengthening””
Adding anchor boltsAdding anchor bolts Strengthening cripple/garage wallsStrengthening cripple/garage walls One size does NOT fit allOne size does NOT fit all
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Anchor BoltsAnchor Bolts Access and Access and
space to workspace to work Mud sillMud sill
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Anchor Bolt Guidelines Anchor Bolt Guidelines
5/8” or ¾” diameter (A307 or A36)5/8” or ¾” diameter (A307 or A36) At least 7” embedment into foundationAt least 7” embedment into foundation Spaced not more than 4’ apartSpaced not more than 4’ apart Minimum of 2 bolts per sill pieceMinimum of 2 bolts per sill piece
One bolt located not more than 12”, and One bolt located not more than 12”, and not less than 5 ½”, from each end of the sill not less than 5 ½”, from each end of the sill piecepiece
California Building Code Requirements
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Anchor boltAnchor bolt Epoxy type adhesives best for older Epoxy type adhesives best for older
concrete foundations (Simpson, CIA, concrete foundations (Simpson, CIA, Hilti, etc)Hilti, etc)
Expansion anchors Expansion anchors Approximate cost per anchorApproximate cost per anchor
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Bolt Sill to FoundationBolt Sill to FoundationWith Square Plate WashersWith Square Plate Washers
Plate washers must be a minimum of 2” x 2” x 3/16”
thick
Square plate washers perform better in quakes than round washers
Galvanized steel plates best
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Sill Bolting (Wide Mud Sill)Sill Bolting (Wide Mud Sill) Existing mud sill is wider than studsExisting mud sill is wider than studs Add new sill pieces between studs IF Add new sill pieces between studs IF
new plywood is to be addednew plywood is to be added Nail new sill to mud sill with 6-10d Nail new sill to mud sill with 6-10d
Common nails per sillCommon nails per sill Install anchor through both sillsInstall anchor through both sills
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Sill Bolting (Wide Mud Sill)Sill Bolting (Wide Mud Sill) Wide Mud SillWide Mud Sill Add New Sill PiecesAdd New Sill Pieces Nail each new sill to Nail each new sill to
mud sill w/ 6-10d mud sill w/ 6-10d Common Nails Common Nails
Anchor bolt thru Anchor bolt thru both sillsboth sills
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StrengthenStrengthenCripple WallsCripple Walls
Crawl SpaceCrawl Space Cripple WallCripple Wall
First FloorFirst Floor
A cripple wall is generally the weakest part of older building because it has insufficiently strong sheathing materials. This can cause full or partial collapse in an earthquake. These areas can be strengthened for relatively low cost by correctly applying plywood sheathing to the cripple walls.
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Plywood Guidelines at Plywood Guidelines at Cripple/Garage WallsCripple/Garage Walls
½” thick, C-DX or Structural I plywood½” thick, C-DX or Structural I plywood Minimum 4’ long wall segments, but Minimum 4’ long wall segments, but
longer segments betterlonger segments better Well distributed among all cripple walls, Well distributed among all cripple walls,
all sides of house. Cover the corners.all sides of house. Cover the corners.
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Plywood Guidelines at Plywood Guidelines at Cripple/Garage WallsCripple/Garage Walls
Use 8d or 10d COMMON nails (3” long), Use 8d or 10d COMMON nails (3” long), not box or sinkers, and not 1 ½” shortsnot box or sinkers, and not 1 ½” shorts
Galvanized nails best, but not essentialGalvanized nails best, but not essential Nail along all edges of each sheet of Nail along all edges of each sheet of
plywood (add blocking); 4” or 6” o.c.plywood (add blocking); 4” or 6” o.c. Vent holesVent holes
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Plywood Guidelines at Plywood Guidelines at Cripple/Garage WallsCripple/Garage Walls
Install plywood sheets horizontally or Install plywood sheets horizontally or vertically, but all the same wayvertically, but all the same way
Install plywood from sill all the way up to Install plywood from sill all the way up to wall top plate; no gaps; no partial height wall top plate; no gaps; no partial height
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Plywood GuidelinesPlywood Guidelines
Nail the plywood to the sill and the studs
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Plywood GuidelinesPlywood Guidelines Nail plywood to wall Nail plywood to wall
top platestop plates No gaps in the No gaps in the
plywood sheathing plywood sheathing between sill and top between sill and top plateplate
Add horizontal Add horizontal blocking at any blocking at any horizontal plywood horizontal plywood panel edgespanel edges
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Plywood GuidelinesPlywood Guidelines Wide Mud SillWide Mud Sill Add New 2x-sill Add New 2x-sill
pieces that match pieces that match the studs so new sill the studs so new sill and studs are flushand studs are flush
Nail plywood to new Nail plywood to new sill pieces and studssill pieces and studs
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Plywood GuidelinesPlywood Guidelines Add clips between Add clips between
rim blocking and top rim blocking and top plateplate
A34 @ 12” o.c., or A34 @ 12” o.c., or minimum one A34 at minimum one A34 at each rim blockeach rim block
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Home/Building Preparedness Home/Building Preparedness Nonstructural ItemsNonstructural Items
ChimneysChimneys Lighting fixturesLighting fixtures Water heatersWater heaters Wall hangingsWall hangings FurnitureFurniture AppliancesAppliances
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Water Heaters Water Heaters Earthquake Earthquake
strapping of strapping of water water heatersheaters
2 metal straps2 metal straps 1/3 points 1/3 points Anchor to studs, Anchor to studs,
not just drywallnot just drywall Elevate Elevate
MEET THE DBI PROS
Additional InformationAdditional Information 72hours.org website72hours.org website USGS.org - personal and home USGS.org - personal and home FEMA 526 – personal preparednessFEMA 526 – personal preparedness Call 800 480 2520 to order free FEMA Call 800 480 2520 to order free FEMA
documentsdocuments NERT– www. sfgov.org/sffdnertNERT– www. sfgov.org/sffdnert ABAG – www. quake.abag.ca.govABAG – www. quake.abag.ca.gov
MEET THE DBI PROS
Thank you for attending!Thank you for attending! We value your opinion.We value your opinion. We’re here to help assist you.We’re here to help assist you. Our goal is to improve the value of our Our goal is to improve the value of our
services to better serve you.services to better serve you. Please fill out evaluation formPlease fill out evaluation form
MEET THE DBI PROS
QUESTIONS ?QUESTIONS ? Use the microphoneUse the microphone Please limit each question to a couple Please limit each question to a couple
minutes maximum minutes maximum
Please fill out evaluation formPlease fill out evaluation form