= EBB Overview 2017 Marks Year Four Up to $3,000 In - - PowerPoint PPT Presentation

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= EBB Overview 2017 Marks Year Four Up to $3,000 In - - PowerPoint PPT Presentation

Apr 28, 2023 7 likes •611 views

EBB Overview Jointly managed by CEA and Cal OES Created to offer retrofit incentives EBB first to promote code-compliant retrofit More than 1 Million homes + = EBB Overview 2017 Marks Year Four Up to $3,000 In

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EBB Overview

  • Jointly managed by CEA and Cal OES
  • Created to offer retrofit incentives
  • EBB first to promote code-compliant

retrofit

  • More than 1 Million homes

+ =

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EBB Overview

  • 2017 Marks Year Four
  • Up to $3,000
  • In Accordance with:
  • Appendix Chapter A3 or
  • Plan Set A or LA City Standard #1
  • Grown Every Year to More Cities and Zips
  • Funding is through CEA; however the last two

years we’ve also received $3 Million from the State of California

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The Process

Timeline: 8 months

  • 2 Months: find contractor and get permit
  • 6 Months: complete work

Step 1: Pre-Retrofit Documentation

  • Permit language reference in scope of work
  • “Retrofit in accordance with Chapter A3 of the CEBC”
  • “Retrofit in accordance with Plan Set A”
  • “Retrofit in accordance with LA City Standard Plan #1”
  • Before photos
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Step 2: Complete Retrofit Step 3: Post-Retrofit Documentation

  • Signed building permit
  • Contractor invoice broken down by materials, labor and
  • verhead/profit
  • After photos
  • Payment Authorization From (provided by homeowner only)
  • IRS W-9 Form (provided by homeowner only)
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The Retrofit Process

EBB was created to provide incentives to California Homeowners to seismically retrofit wood-frame residential structures. The Program is limited to funding retrofit expenses that:

  • strengthen cripple walls to enable them to function as shear

members, significantly protecting the dwelling from collapsing;

  • bolt foundation, enabling the dwelling to remain in place, rather

than sliding off the foundation during an earthquake; and

  • properly strap the water heater to reduce the likelihood of water

and fire damage, and to protect the water supply.

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The seismic retrofit includes adding anchor bolts and bracing in the crawl space around the perimeter of the foundation to improve the connection between the wooden framing and concrete foundation. Contractors experienced in seismic retrofitting, specifically with California Existing Building Code (CEBC) Chapter A3, 2010 Edition, are sought after for this work.

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EBB Retrofit:

Sill Plate Anchorage and Cripple Wall Vulnerabilities

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Cripple Wall Failure

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Dangerous Cripple Wall Damage

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Cripple Wall Damage

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Cripple Wall Damage

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Cripple Wall Damage

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Cripple Wall Retrofits Work

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The legacy of the “Voluntary Retrofit”

  • Just about anything allowed if it didn’t

make the house unsafe

  • Retrofits were often incomplete
  • Retrofits were often not effective
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The Code: Chapter A3

The State of California has adopted, effective January 1, 2011, California Existing Building Code (CEBC) Appendix Chapter A3: Prescriptive Provisions for Seismic Strengthening of Crip ipple le Wall lls and Sil ill l Pla late Anchorage of f Lig ight, Wood-Frame Residential Buildings

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Code Requirements = EBB Requirements

  • Code = CBC Appendix

Chapter A3

  • Engineered retrofit allowed

by A3 for:

  • Cripple walls > 4’-0” tall
  • Walls with many/large openings
  • Construction Documents =

Plan Set A, LA Standard Plan Set or Custom Plans

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Why the 4’-0” or less Cripple Wall Requirement?

4'-0" high wall does not require a hold-down

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Can I use a Plan Set on a house with an attached garage?

If the crawlspace area to be retrofitted meets the requirements of the plan set, AND The building official allows it.

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Garage Retrofit

Often requires engineered solution:

  • > 4’-0” tall wall
  • Requires prefabricated seismic resisting element
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Chapter A3 Prescriptive House

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Chapter A3 Prescriptive House

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A3 Retrofit Requirements

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A3 – Plan Set Comparison

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Retrofit Plan Required

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Retrofit Plan Required

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LABD Sample Plan

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LA Standard Plan

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Plan Set A

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Chapter A3

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Prescriptive Details

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Condition of Existing Wood

  • Wood that is part of the

retrofit shall be “in sound condition and free from defects” such as:

  • Fungus
  • Insect infestation
  • If damaged, replace with

new materials with the same net dimension as the original

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Condition of Concrete Foundation

  • Partial perimeter

foundations or unreinforced masonry (brick, stone, etc.) must be evaluated by engineer

  • r architect
  • New reinforced concrete

perimeter footings may be installed using the prescriptive details

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Chapter A3 allows New Footing

  • New foundation may be

designed per Figure A3-1

  • r A3-2, or be designed

by an architect or engineer

  • A local building official

may require a soils report

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LABD Standard Plan Set allows New Footing

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Dwelling Anchorage to Foundation

Concept:

  • Install anchor bolts

if space permits

  • If not, install

proprietary or engineered anchors

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Dwelling Anchorage to Foundation

Concept:

  • Is also applicable to

basement and retaining walls

  • Contact building

department for additional retaining wall concerns

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New Anchor Bolts

Install with approved washers

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New Anchor Bolts with Proper End Distance

9 to 12 Inches from end

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Add Replacements Bolts

It is not recommended to rely on old anchor bolts

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New Foundation Plate (FP)

Chapter A3 specifies requirements for fabricated FP

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New Foundation Plates

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New Foundation Plates

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Cripple Wall Bracing

Concept:

  • Install sheathing on

inside face of cripple wall to resist load direction F1

  • Anchor top plate to floor

framing above (load in)

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New Plywood Sheathing

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New Blocking

  • Mudsill is often wider than cripple wall studs
  • Blocking required to create a flush face for sheathing
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Properly Placed Nails

  • Size (8d common) and

spacing (4” o.c.) as required by code/plan set

  • No overdriven nails
  • No shiners
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Connect Wall to Floor

Plan Set A allows a Simpson H10 in lieu of Framing Clip Framing Clips

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Framing Clip Detail

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Vent Holes in Each Stud Bay

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Not Seismic Retrofit

Chapter A3 (Plan Set) retrofit is at perimeter bearing walls

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Not Seismic Retrofit

Angles are not approved Chapter A3/Plan Set retrofit

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Seismic Retrofit

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Seismic Retrofit

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Seismic Retrofit

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Seismic Retrofit

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  • Mark Grissom

–Customer Service Manager –mgrissom@calquake.com –916.661.5520

Contacts