MEET THE DBI PROS Meet the DBI Pros

MEET THE DBI PROS “Meet the DBI Pros" Summit October 11, 12, 2007 Isam Hasenin, P. E. , C. B. O, Director RESIDENTIAL EARTHQUAKE PREPAREDNESS

MEET THE DBI PROS Residential Earthquake Preparedness n Joe Duffy, Senior Building Inspector/DBI n Howard Zee, Structural Engineer/DBI Plan Check Services

MEET THE DBI PROS Earthquake Preparedness Presented by Joe Duffy & Howard Zee - San Francisco Department of Building Inspection DBI Summit October 11, 12, 2007

MEET THE DBI PROS Marina photo 1

MEET THE DBI PROS Marina photo 2

MEET THE DBI PROS Marina photo 3

MEET THE DBI PROS PERSONAL PREPAREDNESS Make your family and home as safe as possible. www. 72 hours. org

MEET THE DBI PROS Develop a Family Emergency Plan n Locate safe shelter areas in your home n Identify places to store emergency supplies n Arrange where to meet after a disaster n Establish a distant phone contact (a distant aunt? )

MEET THE DBI PROS Assemble and Maintain Emergency Supplies n Home n Work n Vehicles n Transportable

MEET THE DBI PROS Your “Grab & Go” Bedroom Kit n Shoes – sturdy, with socks n Crowbar n Leather work gloves n Flashlight n Cash, w/batteries ID, cell phone

MEET THE DBI PROS “Grab & Go” Items n ATM, credit cards n Essential medication and eye glasses n Whistle n Scissors n Watch or clock

MEET THE DBI PROS Water – Minimum 1 gallon/person/dayx 5 Unopened store-bought drinking water – check expiration date n Stored tap water should be purified before using it n Store in cool, dark place secure from animals and easy to get to n

MEET THE DBI PROS 1 Gallon person per day

MEET THE DBI PROS Home/transportable supplies n n n n Water purification kit First aid kit and instruction book Antiseptic wipes or baby wipes Foods requiring little heat or water Can opener, eating utensils Toilet paper and personal hygiene items Butane barbeque/fireplace igniter or matches Large garbage bags, duct tape, utility knife

MEET THE DBI PROS more home/transportable supplies… Battery-operated radio, spare batteries n Flashlights, spare batteries, and bulbs n Blankets for all family members n Warm clothes n Diapers, if needed n Pet food, leash, and carrier, if needed n Tent, sleeping bags n Backpacks to carry emergency supplies n

MEET THE DBI PROS Utilities n Natural Gas n Water n Electricity

MEET THE DBI PROS Utilities Train family to turn off utilities, but turn it off ONLY if necessary (or if not sure)

MEET THE DBI PROS Natural Gas n Teach children to identify the smell of gas (rotten eggs) n Turn off gas if you smell leaks, or if you are unsure n Turn off gas if your meter wheels are spinning

MEET THE DBI PROS n Call PG&E to turn gas back on n Do not turn gas back on yourself

MEET THE DBI PROS Natural Gas

MEET THE DBI PROS Water Turn off water if house is flooding or if water is contaminated

MEET THE DBI PROS Shut off Water, IF necessary n Locate water shutoff n Insert tool in hole & remove cover n Turn water OFF

MEET THE DBI PROS Home Preparedness Structural n Structural evaluation by architect or engineer n n n Seismic upgrade/retrofit Meets Code requirements Do-it-yourself strengthening n n Improves strength, but it’s NOT a seismic upgrade/retrofit Not as good, but better than nothing

MEET THE DBI PROS Seismic Upgrade or Seismic Retrofit n Building permit required for voluntary seismic upgrade/retrofit per SFBC 3403. 6, 1605. 4 and 1605. 4. 3 n Engineered design by architect or engineer n Civil engineer or structural engineer n Fee: a few thousand $ up to much more n It’s a seismic upgrade / seismic retrofit

MEET THE DBI PROS Do-it-yourself Voluntary Strengthening n No drawings required, but must get a building permit n Engineer’s stamp not required n Architect’s stamp not required n It’s NOT a seismic upgrade or retrofit

MEET THE DBI PROS n n n Description of work: “voluntary strengthening work to add anchor bolts and plywood at lowest story, etc” Residential Permit Counter (1 st floor) No drawings, architect, or engineer required Over-the-counter permit approval It’s NOT a “seismic upgrade or retrofit”, it’s a “voluntary strengthening”.

MEET THE DBI PROS General Guidelines and Tips for “Voluntary Strengthening” n Adding anchor bolts n Strengthening cripple/garage walls n One size does NOT fit all

MEET THE DBI PROS Anchor Bolts Access and space to work n Mud sill n

MEET THE DBI PROS Anchor Bolt Guidelines California Building Code Requirements n 5/8” or ¾” diameter (A 307 or A 36) n At least 7” embedment into foundation n Spaced not more than 4’ apart n Minimum of 2 bolts per sill piece n One bolt located not more than 12”, and not less than 5 ½”, from each end of the sill piece

MEET THE DBI PROS Anchor bolt n Epoxy type adhesives best for older concrete foundations (Simpson, CIA, Hilti, etc) n Expansion anchors n Approximate cost per anchor

MEET THE DBI PROS Bolt Sill to Foundation With Square Plate Washers Square plate washers perform better in quakes than round washers Galvanized steel plates best Plate washers must be a minimum of 2” x 3/16” thick

MEET THE DBI PROS Sill Bolting (Wide Mud Sill) n Existing mud sill is wider than studs n Add new sill pieces between studs IF new plywood is to be added n Nail new sill to mud sill with 6 -10 d Common nails per sill n Install anchor through both sills

MEET THE DBI PROS Sill Bolting (Wide Mud Sill) Wide Mud Sill n Add New Sill Pieces n Nail each new sill to mud sill w/ 6 -10 d Common Nails n Anchor bolt thru both sills n

MEET THE DBI PROS Strengthen Cripple Walls First Floor Crawl Space Cripple Wall 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.

MEET THE DBI PROS Plywood Guidelines at Cripple/Garage Walls n ½” thick, C-DX or Structural I plywood n Minimum 4’ long wall segments, but longer segments better n Well distributed among all cripple walls, all sides of house. Cover the corners.

MEET THE DBI PROS Plywood Guidelines at Cripple/Garage Walls n Use 8 d or 10 d COMMON nails (3” long), not box or sinkers, and not 1 ½” shorts n Galvanized nails best, but not essential n Nail along all edges of each sheet of plywood (add blocking); 4” or 6” o. c. n Vent holes

MEET THE DBI PROS Plywood Guidelines at Cripple/Garage Walls n Install plywood sheets horizontally or vertically, but all the same way n Install plywood from sill all the way up to wall top plate; no gaps; no partial height

MEET THE DBI PROS Plywood Guidelines Nail the plywood to the sill and the studs

MEET THE DBI PROS Plywood Guidelines Nail plywood to wall top plates n No gaps in the plywood sheathing between sill and top plate n Add horizontal blocking at any horizontal plywood panel edges n

MEET THE DBI PROS Plywood Guidelines Wide Mud Sill n Add New 2 x-sill pieces that match the studs so new sill and studs are flush n Nail plywood to new sill pieces and studs n

MEET THE DBI PROS Plywood Guidelines Add clips between rim blocking and top plate n A 34 @ 12” o. c. , or minimum one A 34 at each rim block n

MEET THE DBI PROS Home/Building Preparedness Nonstructural Items n Chimneys n Lighting fixtures n Water heaters n Wall hangings n Furniture n Appliances

MEET THE DBI PROS Water Heaters n n n Earthquake strapping of water heaters 2 metal straps 1/3 points Anchor to studs, not just drywall Elevate

MEET THE DBI PROS Additional Information n 72 hours. org website n USGS. org - personal and home n FEMA 526 – personal preparedness n Call 800 480 2520 to order free FEMA documents n NERT– www. sfgov. org/sffdnert n ABAG – www. quake. abag. ca. gov

MEET THE DBI PROS Thank you for attending! n We value your opinion. n We’re here to help assist you. n Our goal is to improve the value of our services to better serve you. n Please fill out evaluation form

MEET THE DBI PROS QUESTIONS ? Use the microphone n Please limit each question to a couple minutes maximum n n Please fill out evaluation form