Your career as a certified DSA school inspector
copyright 2006 DSA Inspection Resource
Ok, you’ve got the right background to
be a project inspector, you passed your DSA exam, you found an inspection firm
that wants to hire you and you’re thinking what do I do next?
Before we talk about your activities on
the job site, let's review some of the books and reference materials you
may need to help you perform your inspections.
BOOKS NEEDED FOR INSPECTION
What books and reference materials will you need to have with you when you
perform DSA inspections? The answer depends on your DSA classification;
Class 1, 2, 3 or 4. It depends on the scope of the project you are working
on. It also depends on your background experience and knowledge. You can’t
have too many reference books, manuals or product catalogues available;
any and all reference materials can prove valuable to you at sometime
during your inspection career.
Prices shown are non-member prices. Prices were gathered in 2001 and have
since changed but this will give you some idea of the costs. If you are a member of an organization
that publishes any of the books or materials mentioned below, you may be
eligible for discounts. Many updated versions of
Title 24 have been issued since the creation of this web site. There
have been considerable changes in format and
regulations. Newer code versions require additional ASTM reference material that can be costly.
Purchase them as you need them.
DSA Title 24, Part 1 requires that the DSA certified inspector
maintain the following code books at the job-site during construction
(reference IR A-8):
1. Title 24, Part 1 (administrative code). $43
2. Title 24, Part 2, Volumes 1, 2 and 3 (building code). $129 each (vol. 1
3. Title 24, Part 3 (electrical code). $130
4. Title 24, Part 4 (mechanical code). $128
5. Title 24, Part 5 (plumbing code). $120
6. Title 24, Part 6 (energy code). $39
7. Title 24, Part 12 (referenced standards) $30
Recommended Reference Materials
1. Project Inspector Overview Training Part 1 and 2 (seminar books
available from DSA highlighting and detailing code related inspector
duties and inspection requirements). Part 1 covers Administrative and
Structural. Part 2 covers Accessibility, Fire & Life Safety, Electrical,
Mechanical and Plumbing. Call 916
324-3602 for more information. These books are part of the required
certification and re-certification seminar classes.
2. ASD Steel Construction Manual (reference standard for fabrication,
erection, and bolting of steel). $439
3. AWSD1.1 (Structural Welding Code-Steel) $376
4. AWSD1.3 (Structural Welding Code-Sheet Steel) $122
5. AWSD1.4 (Structural Welding Code-Rebar) $146
6. ACI manual of Concrete Practice (detailed information for concrete and
masonry work). 6 volumes. $747
7. CRSI Manual of Standard Practice (methods of placing rebar for concrete
construction and masonry construction). $39
8. Masonry Institute of America- Masonry Codes and Specifications (manual
of recognized codes and specifications for masonry construction). $30
9. Masonry Institute of America- Reinforced Concrete Masonry Construction
Inspector’s Handbook (Detail information on reinforced masonry
construction). May not be available any longer?
10. Uniform Building Code Volumes 1 and 2 (Title 24 building code is based
on the Uniform Building Code but includes modifications including added
requirements and sections of the UBC that have not been adopted by DSA).
Note: The UBC has been replaced by the
International Building Code. At this date, Title 24 continues to reference
the UBC. $16 each
11. International Building Code Referenced Standards (ASTM material,
construction, and inspection standards referenced by the International
Building Code). $140
12. NFPA 101 Life Safety Code (fire and life safety requirements). $86
13. NFPA 101 Life Safety Handbook (illustrates fire and life safety
requirements with graphical presentations). $124
14. NFPA 13-99 Automatic Sprinkler Systems Handbook $124
15. National Fire Alarm Code NFPA 72 (fire alarm installation code). $52
16. ADA Americans with Disabilities Act California Compliance Manual
(handicap access requirements detailed). $65
17. SMACNA Seismic Restraint Manual (anchorage, support, bracing of HVAC
duct and equipment) $177
18. Simpson Wood Connectors (manual of catalogues covering Simpson
manufactured wood connectors).
19. Hilti Firestop Inspection and Installation Manual (Manufacturers data
and detailed instructions for using Hilti Firestop products).
20. Hilti Fastener Catalogue (manufacturers catalogue for Hilti fastener
21. Ramset/Red Head Architects and Engineers Manual (manufacturers
22. 3M Fire Protection Products manual (manufacturers data and
recommendations for installing 3M fire caulk products).
23. WWPA Grading Rules (Grading rules and stamps for grading wood timber).
24. Metal Stud Manufacturers Association handbook (metal stud data and
25. Grace Thickness Handbook (manufacturers data on application-thickness
for Monokote fireproofing).
Total Cost of books as shown above: $2699.00. Note: discounts are
available as members of various associations (e.g. ACI). Product
literature is sometimes available for free or at a very minimal price upon
request from the manufacturer. Visit the “code book” and “association”
links provided in the “resource” section of this web site.
In addition to the above reference and
code materials, go to DSA web site, click on "Publications" and download
(free) "DSA Interpretation of Regulations Manual"!
2013: New forms
apply including inspection cards (Form 154) covering all phases of the
work and inspection. A DSA Form 154 must be issued prior to commencement
The form numbers
shown below have been changed. All DSA forms can be found
Before you ever set foot on a project as the inspector of record, you
must be approved by the architect, the engineer, the school district and
DSA for each individual project you will inspect. Your certification is
only the first step. You will submit your qualifications for a project on
a DSA 5 form, usually delivered to the architect in multiple copies, each
"wet "signature. The form will be returned to you with signatures from all
parties indicating your approval. If you are using an assistant inspector
you must submit DSA-111 (download free from "Forms" on DSA web site) to
DSA and the design professional (architect).
Your first experiences on a project as a construction inspector will
depend somewhat on the quality and professional level of the contractor(s)
involved on your project. Most schools in California award the project to
the lowest bidder, so you get what you get.
You’ve inherited all this responsibility, you’ve got to answer to your DSA
field engineer and the architect, and then there’s the “required duties of
the project inspector” outlined in DSA IR A-8 (California Building
Standards Administrative Code (Title 24, Part 1). Take a deep breath; take
first things first. My only experience is as a Class 1 inspector so some
of this information may or may not apply to your Class 2, 3 or 4 projects.
Unless you walk into the middle of an ongoing project, things don’t happen
all at once. After submitting your DSA 5 form (multiple wet-signed copies)
to the architect for approval by the owner, the design professional, the
structural engineer and the State of California you will most likely
attend a pre-construction meeting administered by the school district or a
contract management firm. You will introduce yourself to the team members
and be given a projected start date based on issuance of a ‘Notice To
Proceed’. You will exchange phone numbers with key players and have a
chance to talk with the team about your expectations as the project
inspector (e.g., request that, when a fax is set up, any information
generated by the team be forwarded to you so you can be kept in the loop).
You will want to ask for a copy of the “stamp approved” DSA drawings and
specifications. Be specific in this request since everything that follows
is based on having approved drawings with a DSA “A” (application) number.
Actually you need two numbers; the file number (a number that DSA uses to
designate the school district and the application number.
You will want to ask when a job site trailer will be provided for you.
Will phone and phone lines, fax and fax lines, power, and AC be provided.
If no site trailer is to be provided but the project is of a size that you
must maintain files and communication, you will need a secure space
provided. May I emphasize secure? You don’t want vandals hauling off your
computer or files. You don’t want unauthorized persons going through your
Prior to starting work you must contact DSA. Before doing this you have
your application number handy and make sure you’re in receipt of a copy of
the approved plans and specifications. DSA is broken up into divisions. If
you’re working in the Orange County area you will be under the San Diego
office jurisdiction. If you’re working in San Francisco you will be under
the San Francisco office jurisdiction, etc. To find out, call the main DSA
office in Sacramento or any of the offices listed below:
DSA Headquarters Office
David F. Thorman, AIA
State Architect of California
1102 Q Street, Suite 5100
Sacramento, California 95814
DSA San Francisco Bay Area Regional Office
1515 Clay Street,
Oakland, California 94612
DSA Sacramento Regional Office
1102 Q Street, Suite 5200
Sacramento, California 95814
DSA Los Angeles Basin Regional
700 N. Alameda Street, Suite 5-500
Los Angeles, California 90012
DSA San Diego Regional Office
16680 West Bernardo Drive
San Diego, California 92127
Prior to project start-up you should
begin reviewing the approved plans. Check to make sure that the DSA stamp
is present on each page of the drawings, that each stamp is signed and
dated, and that the date is more recent than any changes that were made to
the drawings. Don’t panic when you find out only half the drawings you
have are signed and dated by DSA. You’ve got the architect’s phone number
on the approved plans (see the “A” sheets). Call the architects office,
ask the architect in charge of your project and discuss the issue. There
may be a more recent set of drawings or there may be a change order out
that covers the pages that are not stamped. Be firm on the need to have
approved plans on site and ask for his/her assistance. If all fails,
contact your DSA field engineer and discuss the issue and how to proceed.
Have the project application number ready.
Locate the DSA Structural Tests and Inspections (T&I) sheet. The architect
can provide you with this vital piece of information. It may also be in
the project specification. It will have the project file number and
application number and be on DSA letterhead (form SSS 103). Minimum
testing and inspection requirements for all elements of the project will
be highlighted on this sheet. DSA will ask that you have and refer to a
copy of this document.
When reviewing the plans and specifications on a Class 1 project, realize
that the things are constructed logically. Prior to a building going up
you’ll have site work (survey, grading, trenching, underground utilities,
over-excavation and soils compaction). Focus on these elements of the
project with some reflection on structural footings to avoid piping from
passing through footings, etc.
Ask your District contacts which firm they’ve contracted to perform
testing and inspection. Make sure the testing lab is noted on the DSA web
site as a DSA approved testing lab. The IOR should not be an employee or
contracted with the testing lab.
Set up a log so you can make entries every time you call the approved lab
for special inspections (e.g. soils, batch plant, concrete, masonry, shop
fabrication, welding, pull testing, fireproofing, sampling).
When you have an on-site office established, begin setting up files, plan
tables, communication (fax, phone, email). Use the contract specifications
to help you set up file names for submittals. Set up files for storing
information on testing, inspection, meeting minutes, change orders, RFI,
mix designs, non-compliance, IOR transmittals, etc. Set up boxes or files
for submittals and product samples. Set up binders as needed. Maintain a
phone book with contact numbers.
Let DSA know that you have established an office on site. They will visit
you at their discretion, typically without notice. The visits may become
less frequent as they develop a level of confidence in your ability to
coordinate inspection and testing.
Is there a construction schedule published? You need a copy. This is how
you will forecast special inspection needs and plan your own site
inspections. The schedule will not only show site activities with windows
of time to begin and complete the work, but may also indicate “critical
path” activities; activities that drive the project with regard to time.
OK, you’ve got your office, documents, approvals, files, communication
links and you’re ready to go.
Soils and Underground Utilities
Typically, the site must first be prepared. The basis of this preparation
will be outlined in the soils investigation and recommendations report.
You need a copy of this document. It may be contained within the project
specifications. It may be separate. Read it!
The other document you’ll need is the Civil drawings typically showing
demolition, grading elevations and site utilities.
After the site is surveyed, grading operations will begin. Underground
utilities will start so that power, LV pathways, water, fire water, sewer
and storm drain can be made available to the new structure. Although you
have limited control over grading activities you will be asked to
coordinate soils inspection as the work progresses. Make sure your soils
person has the same soils report that you have. Make sure that any
import-soil is approved by the testing lab prior to use, that any
over-excavation or re-compaction is observed and tested.
Demo of existing underground utilities is an important part of site
improvement. If existing irrigation lines are cut and not capped, water
may flow and cause a delay to soils or footing work underway. Abandoned
piping and larger conduit to remain in place may become hidden pathways
for water migration and should be capped at the site limits or where
encountered during excavation work.
For building footings, the bottoms of the footings must be on firm ground.
The most important thing to check is the over-ex and re-compaction
requirements. Typically, a building either have the soil beneath the
building footings and the soil within a distance of 5 feet of the footings
over-excavated and re-compacted to 90% compaction. The requirements will
vary depending on soils conditions and height of the water table. Piles
may be required which require continuous observation by a representative
of the soils engineer (Title 24 Chapter 18).
How will you know when to call for special inspections? Read the contract
documents and use some simple rules-of-thumb; Nothing gets built until the
substrate below it is approved. Nothing gets concealed until it is
inspected and approved. The use of Inspection Request forms helps organize
and document this process. Contract specifications may specify that
contractors give 24 to 48 advanced written notice for all inspections.
As excavations for underground utilities advance, you must be prepared to
document the depth of the trench and make sure the contractor keeps a
record set of as-builts that will remain on site and turned over to the
school when the project is complete. Remember that when you are measuring
the depth of a trench it is the burial depth of the utility that must be
in compliance with plan details or specifications. A pipe trench may
require sand bedding before laying the pipe. Most importantly, check with
the grading contractor to make sure the area where trenching is underway
has been cut to finish grade less any base and finish. If a trench is cut
in an area where subgrade has not been truly established, odds are that
your utility (pipe or conduit) will be too high to finish-surface after
the area is cut to grade. You won’t be operating the survey equipment
yourself but you can ask for the grading contractor to mark the as-builts
indicating all areas where established grades are in compliance with the
Now is the time to ask for approved concrete mix designs. All concrete
that will be placed on your project will require a submittal of the
concrete design mixes to the architect and structural engineer for written
approval. Be careful, mixes may be approved for specific applications
(e.g. 4000 psi for flatwork, 5000 psi for footings, etc).
The first concrete you will see may be slurry to be used to cover
underground utilities. Will it be a one-sack, two-sack or three-sack mix?
It’s not your job to engineer the project. Get an approved design mix for
all concrete, including slurry for underground utilities. Check with your
soils person when slurry backfill will be used under future footing areas.
Prior to backfilling utility trenches you must inspect the conduit or pipe
per the contract specifications. Conduit may require a mandrel to verify
that the conduit is clear. Piping will require a head or pressure test.
San bedding, sand cover conduit chairs, spacing of pipe and conduit,
pressure testing; all these activities require inspection and should be
noted in your daily report.
During backfill you will need the soils person on site to make
observations and test for compliance with compaction requirements. Failed
areas must be re-worked and re-tested. Remember, trench backfill
compaction requirements will differ depending on whether the trench is in
a fire lane, roadway, sidewalk, flatwork, or landscape area. Compaction
requirements may vary from 85% in a landscape area to 95% in a fire lane.
During excavation for site utilities, watch that no excavations are made
within the surcharge of an existing structure footing. Details indication
this restriction are usually, but not always, provided on the approved
plans. Check with your soil person to get educated on this important
issue. See Title 24 Chapter 18; “…backfilled trenches parallel with a
footing shall not be below a plane having a downward slope of 1 unit
vertical to 2 units horizontal from a line 9 inches above the bottom edge
of the footing and not closer than 18” from the footing.”
Foundations and Footings
When the contractor starts digging footings remember that you must contact
your DSA field engineer 48 hours prior to completion of foundation
DSA IR A-8.
See Title 24 18 for specific information on foundations. Assuming there’s
no deep-pile-footings on the project, the contractor’s next step is to dig
footings into the re-compacted and tested soil. The soils person should
verify compaction at the bottom of the footings prior to installing rebar.
The inspector (IOR) must verify the footing depth and width.
My intention here is to provide a general overview on typical inspection
activities on a Class 1 school project. Specific information on
foundations, rebar and concrete will be found in your approved plans and
Title 24, Part 2.
You’ve got signed engineer approved mix designs on site. Footings are
being dug and inspected. Rebar will be coming soon and it’s time to notify
the contractor of the need to positively identify and sample the rebar
prior to installation in the footings. Although the rebar can be
identified and sampled in the field, the best way to manage rebar
identification is to arrange for the fabricator to notify you through the
contractor prior to fabrication (cutting, bending operations). The
inspector will call the approved testing lab who will dispatch a
technician to sample and I.D. the rebar at the fabricator’s shop per
chapter 19 in Title 24. Have the lab person gather mill certifications for
all steel and attach wired inspection cards on each bundle of bars to be
shipped to the site; indicating that the steel has been inspected and
It is best to request that mill certs accompany all deliveries of rebar to
the site, even though this may duplicate the labs activities. Having the
mill certs will allow you to spot check the rebar at time of delivery by
checking that the mill markings on the rebar match up with the
manufacturer, grade and size of rebar delivered. If the bundles have been
tagged by the approved lab, you will know that the lab also went through
this routine to establish positive identification.
If you don’t have the background to perform on-site rebar inspection, call
the testing lab for a certified concrete inspector.
When the rebar, dowels for walls, curbs and slab, embeds, column base
plates, anchor bolts and any required sleeves (check your plans for
accepted means of installing pipe or conduit through or below a footing)
have been installed and inspected, it’s time to place concrete using the
approved footing concrete mix. Batch plant and site concrete testing is
required by the code. If approved by DSA and your structural engineer,
batch plant inspection may be waived. However, on a large-scale project
don’t count on this happening.
Typically, the batch plant inspector will be at the batch plant one hour
prior to delivery at the site. This should be considered when arranging
for special inspection.
The site inspector will ask how many test cylinders they should make.
While the code requires one set of two concrete cylinders for each 50
yards of concrete (except that 3 cylinders is required for each mix at the
beginning of concrete work), the specification may call for 4 or 5
cylinders each test. One cylinder may be a “hold”, one for a 7-day break
and the remainder for a 28-day break. Check your documents.
You should get copies of all field and shop special inspection reports
issued to you daily. Non-conformance items should be clearly noted.
Make sure you are also being sent copies of all lab inspection and testing
reports! It is in your scope of work to not only make sure that all
required testing is performed but to check that the test results all show
compliance. Look each test report to check for compliance before stashing
it in your job file.
testing lab has a responsibility to issue copies of all reports to DSA.
The testing lab should forward copy of all special inspection reports to
DSA within 14 days of issuance. The testing lab is also responsible for
issuing verified reports at the end of each project. Make sure you
request copies of Form 292 for each special inspector when their duties
have been completed. This is where the special inspector signs under
perjury that the work inspected is in compliance with the approved
Curbs and Slab
The next step will be to get the slab and curbs placed. Again, soils
testing, utility piping, penetration sleeves, rebar, anchors, embeds, wall
dowels….make sure it’s all in prior to placement of concrete. Check that
you have an approved mix design designated for slab on grade use.
At this point you must look at the formwork and pay attention to sill
anchors and embeds that are required for framing. By now you need to have
knowledge of the framing activities that will follow.
Don’t forget to check for any vapor barrier, sand or gravel that may be
required under the slab.
Vapor barriers simple heavy mill plastic or they can be expensive complex
materials with strict limitations on penetration and edge sealing. Ever
seen stainless steel screed embeds that remain in the concrete to avoid
penetrating the membrane?
I’m avoiding discussion on elevator pits and hydraulic elevator casings.
These items as well as storage tanks or grease pits will add scope to your
Retaining walls will require sub-drainage along backside of the wall.
Watch for waterproofing requirements at sub-grade walls.
Framing will be with wood, structural steel, and/or metal studs. This is
the point at which you will discover if your anchor bolts (column anchors,
sill anchors, hold down anchors) were installed in the correct locations.
Where anchor bolts are missing you’ll need approval from the engineer (RFI)
to use epoxy anchors. Ask for the pull test value from the engineer
because epoxy anchors, if approved, will require pull testing by the lab.
Pull testing requires access and special equipment that may or may not
work where framing is in place so coordination is required to avoid
removing framing to allow for the testing.
Slotting of holes at framing to allow installation at the anchor bolts is
not typically allowed, There may be cases at steel column base plates
where the engineer approves the use of slotted holes where welded washer
plates are used, but the anchor bolt may not be long enough to allow this
type of correction. Slotting holes at sill plates is not allowed.
Remember that all foundation plates or sills on concrete slabs resting
directly on earth or sills that rest on concrete or masonry foundations
must be pressure treated in accordance with accepted standards. Column
steel should not terminate below grade unless protected by concrete. Dry
rot, termite infestation and oxidation (at steel) destroy framing elements
at the building foundation.
If you’re working with wood framing there’s a lot to learn. Special
requirements are in place for hold-down anchors, thickness of sill plates,
shear frame nailing and sheeting, and straps. Framing requirements at
openings, splices and corners are of particular concern. Limitations for
notching and penetrating wood are indicated in Title 24 Chapter 23. A
clear understanding of plan reading and code (Title 24 Chapter 23)
requirements is needed to inspect wood framing. DSA publishes information
on all these topics in their seminar booklets.
Contact a recognized lumber grading association like the Western Wood
Products Association (http://www.wwpa.org)
or West Coast Lumber Inspection Bureau (http://www.wclib.org)
and request a lumber grading manual. The acceptable grades of wood for
framing will be on the approved plans or in the contract specifications.
There are accepted limits of moisture content that are permitted on a
project. Check your specifications and available resources like the WWPA
If you contact Simpson (http://www.simpsonanchors.com/),
or other recognized fastener companies you can request free catalogues
showing information on their product line of fasteners and straps. This
will assist you in understanding what type of fastener is being called out
for on the plans.
When nailing operations are underway, make sure that the correct size and
type of nail is being used. Galvanized nails are required when nailing
into pressure treated sill plates. Nail guns have replaced the hammer.
Check to make sure the guns are driving the nails in properly. Overdriven
nails will break the outer layer of the plywood. Under-driven nails will
require further engagement using a hammer. Palm held hammers can be used
to nail in areas where access is restricted. Title 24 Chapter 23 has a
nailing schedule indicating minimum nails and nail size to be used at
various framing elements. A similar schedule may be provided on your
approved plans. Minimum nail penetration is outlined in an understandable
manner in DSA’s structural seminar books.
Splitting of wood framing is a concern during nailing operations. When
splitting is evident, pre-drilling is required to avoid splitting.
You’ll need to study up on wood trusses and glue-lam beam construction
when they are used in your project. Wood trusses are typically
pre-engineered by the manufacturer’s engineers. Wood truss manufacturers
are required to have periodic third party inspection (outside agency) of
their shop operation and assemblies. Glue-laminated timber must be
identified by the grade mark of certificate of inspection by an approved
independent code-recognized agency. The inspector must verify compliance
with the approved plans.
Make sure that any holes or notches cut in engineered timber or trusses is
approved first by the engineer.
Bottom plates, studs, joists, top plates, bridging, bracing, blocking,
fire blocking; if your classification includes wood framing it’s time to
hit the books and understand what all the required elements will be.
When structural steel is used for your primary framing you will need to
make sure that all necessary shop and field inspections are performed.
Anchors have been pre-set in your concrete footings using templates based
on the steel fabricator’s base plate detailing. Hopefully the fabricator
will visit the site to verify layout prior to fabricating the steel. The
steel fabricator must be made to understand that he will be required to
notify you prior to starting shop fabrication of steel.
When you are notified, you’re first call will be to have the steel
positively identified (or sampled for testing if not identified) prior to
cutting and fabrication. A special inspector or qualified lab person will
go to the shop, receive the mill certifications and match up the heat
numbers with those preserved on the steel (foil tags). Transfer of heat
number will be required as sections are cut when using high-strength
steels such as A572 or A992 steel. You should receive copies of the mill
certifications with any steel delivered to the site. The lab will maintain
it’s own file, although you can request copy from the lab for your files.
I always ask for certifications with any structural materials delivered to
Practical Inspection Information for more!
DSA, DSA inspection, DSA
inspector, Class 1 inspector, Class 2 inspector, Class 3 inspector,