Visual Inspection Concrete Coalition Toolkit

Number of hazardous concrete buildings in California.

1. Estimate number of pre-1980 concrete buildings in specific jurisdictions.◦ Capture buildings constructed with 1973 UBC or earlier

2. Extrapolate to estimate number in state.

3. Perform studies to determine which are most hazardous. (PEER)

What Are We Looking For?

Category NumberTotal Number of Buildings ATotal Number of Concrete Buildings BPre-1980 Buildings CPre-1980 Concrete Buildings D

Tips for Identifying Concrete Buildings

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Walk behind the building – fewer architectural finishes◦ Look for form boards

Look for elevated floor/cripple wall – probably wood◦ Vents

Knock on wall Differentiate from tilt-ups

◦ Look for joints or pilasters Look for retrofits more typical of URM

Older buildings of mixed construction due additions are problematic.◦ Count buildings with significant concrete portions.

Look out for podium type structures ◦ (i.e. concrete parking structures under wood

frame buildings).

Add photo

Some Buildings …

Look like brick (from the front )

(but are…)concrete in the back

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Concrete Building TypesCount Data

Optional – Other Databases Available1

Do Not Count Data

City Buildings X

County Buildings X

State Buildings X

Post Offices X

County and State Courthouses X

Federal Office Buildings and Courthouses X

Hospitals Regulated by OSHPD XUtility-Owned Bldgs. Including Substations X

Grade K-12 Public Schools X

UC and CSU X

Community Colleges X1 Volunteers must indicate if they counted these building types.

What To Count

Concrete Building Types Count Data

Optional – Other Databases Available1

Do Not Count Data

Prisons XSpecial Districts including Pump Stations and Buildings at Treatment Plants X

Churches X

Port Buildings X

Regional, County, and city Parks X

1 Volunteers must indicate if they counted these building types.

Concrete Building Types Count Data

Optional – Other Databases Available1

Do Not Count Data

Concrete Frame with Masonry Infill XWood-frame residential on Conc. Podium

X

1-Story Cast-in Place Concrete with wood Roof (including walls with pilasters)

X

Concrete Shear Wall with Steel Gravity Frame

X

Mixed Construction2 XTilt-ups XDual System with Concrete Shear Wall3 XParking Garages XBuildings Whose Concrete Elements are Limited to Fire Walls Between Sections

X

Buildings Whose Concrete Elements are Limited to Basement or Retaining Walls

X2 Includes horizontal additions of concrete as well as buildings with concrete lateral load systems in one direction only.

3 Do not need to make exceptional efforts to verify whether a building has a dual system or not, but if you know, don’t count it.

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What To Count Concrete Building Types Count

DataOptional – Other Databases Available1

Do Not Count Data

Retrofitted Buildings4 XAbandoned Buildings XBuildings in Areas Scheduled for Redevelopment

X

Building-like Non-building Structures5 XNon-building-like Non-building Structures6 XConcrete Structures Supported on Piers or Wharfs over Water

X

Buildings used for storage – No Occupancy X4 Obtain approximate retrofit date is possible.

5 Includes campanile, substation and pumping stations.

6 Includes silos, tanks, bridges, canopies, covered walkways and monuments.

Do not include concrete block buildings without concrete walls.

Tilt-ups – Not Included in Count Poor seismic

performance ◦ Separate

ordinance Look for joints or

pilasters

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If in doubt, count it and note that you have counted it.

Your City

Category ESTIMATE

Total Number of Buildings Possible Source: Assessors’ Data

Total Number of Concrete Buildings + or – 10-20 %

Pre-1980 Buildings Possible Source: Assessors’ Data

Pre-1980 Concrete Buildings + or – 10-20 %

Reminder – Ultimate Goal