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Chapter 26 - ConstructionDocuments and Inspection
ACI 318-14:
Reorganized for Design
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Background
Provisions dispersed
Mixed in with design provisions
Some provisions required interpretation
Often difficult to tell when all constructionprovisions were met
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Ch. 26 Construction Documents and Inspection
Purpose
Define the responsibility of the LDP regarding
minimum information in construction documents.
Why?
Increased awareness and clarity
Confusion regarding how ACI 318 was intendedto be used
Avoid general compliance statements
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26.1: Scope of Construction Documents
Information conveyed to the contractor
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Design information
Developed during design phase by the LDP
Specific to the job
Describes the construction of the work
Example: member dimensions
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Compliance requirements
General provisions
Minimum quality levels
LDP selects the requirements that areapplicable
ACI 301 is consistent with the compliancerequirements in Chapter 26
Example: Allowable ASTM specifications forcement
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Example of 318-11 Construction Provision
21.9.9 Construction Joints All concrete construction joints in structural walls shall
conform to 6.4 and contact surfaces shall be roughenedas in 11.6.9
6.4.3 Construction joints shall be made and located as not to
impair the strength of the structure. Provision shall bemade for transfer of shear and other forces throughconstruction joints. See 11.6.9
11.6.9 When concrete is placed against previously hardened
concrete, the interface for shear transfer shall be cleanand free of laitance. If is assumed equal to 1.0, theinterface shall be roughened to a full amplitude ofapproximately in.
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Same Example in 318-14
26.5.6 Construction, contraction, andisolation joints
26.5.6.1 Design information
(b) Details required for transfer of shear and other
forces through construction joints.
(c) Surface preparation, including intentionalroughening of hardened concrete surfaces where
concrete is to be placed against hardened
concrete.
26.5.6.2 Compliance requirements
(d) Construction joints shall be cleaned andlaitance removed before new concrete is placed.
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26.1: Scope of Construction Documents
Code is written to LDP
References directing the contractor to thecode are to be avoided
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Typical Drawing General Note
Al l la p sp lic e s sho w n o n th e se d ra w ing s sha ll
c o nform to AC I 318-11, C ha p ter 12.
Who designs the lap splice?
A. Contractor
B. Reinforcing steel placing subcontractorC. Reinforcing steel detailer
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Is this any better?
Al l la p sp lic e leng ths sha ll b e sho w n o n the
shop (p la c ing ) d ra w ing s a nd subm it ted to the
Eng ine er fo r a p p ro va l.
Now the Engineer has some responsibility..
But is he/she really designing the lap splicelength?
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318-14 Conformance
Al l la p sp lic e s sha ll c o nfo rm to the fol lo w ing
t ab l e :
Bar
Size
Lap Splice Length, in.
Beams, Slabs Columns
# 3 19 NA
# 4 25 NA
# 5 31 NA
# 6 37 NA
# 7 54 NA
# 8 62 51
: : :
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How is this chapter used?
Checklist
Only applicable requirements
Do not reference chapter
Copy/modify compliance requirements
R26.1.1(a)
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Use of ACI 301
ACI 301 Checklists
Coordination with corporate specs
Read it!
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Ch. 26 Construction Documents and Inspection
13 sections in Ch. 26
ScopeDesigncriteria
MemberInformation
Concretematerials&mixture
requirements
Concreteproduction&construction
Reinforcement
materials&
constructionreqts.Anchoring
toconcreteEmbedments
Additionalreqts
forprecast
Additional reqts for
prestressed
Formwork
Evaluation&acceptance
Inspection
LDP
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26.2: Design Criteria
Governing buildingcode
Design loads
Delegated designs(e.g. formwork andshoring, precast)
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A. CODESANDSTANDARDS
1. THEFOLLOWINGCODESANDSTANDARDS,INCLUDINGALL
SPECIFICATIONSREFERENCEDWITHINSHALLAPPLYTOALL
WORKPERFORMEDONTHEPROJECT.USETHELATESTEDITIONS
UNLESSNOTEDOTHERWISE.
a. THEINTERNATIONALBUILDINGCODE 2015,
INTERNATIONALCODECOUNCIL
b. MINIMUMDESIGNLOADSFORBUILDINGSANDOTHER
STRUCTURES(ASCE7),AMERICANSOCIETYOFCIVIL
ENGINEERS
c. BUILDINGCODEREQUIREMENTSFORSTRUCTURAL
CONCRETE(ACI
318
14),
AMERICAN
CONCRETE
INSTITUTE
d. ACIMANUALOFCONCRETEPRACTICE(2014) PARTS1
THROUGH7,AMERICANCONCRETEINSTITUTE
Example Governing Building Code
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Example Design loadsB. DESIGNDATA
1. GRAVITY SUPERIMPOSEDDEADLOADS
AREA PSF
FLOORS 05
ROOF 05
2. GRAVITY FLOORLIVELOADS
LIVELOADSONFOUNDATIONS,COLUMNS,BEAMS,ETC.AREREDUCIBLEIN
ACCORDANCEWITHTHEBUILDINGCODE.UNREDUCIBLELOADSARE
FOLLOWEDBY(U)
AREA PSF
PARKINGGARAGES 40(U)
PARKINGGARAGES,TOPFLOOR 40 SNOWLOAD
INDICATEDBELOW
STAIRS&EXITWAYS 100(U)
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26.3 Member information
Design Information
Member size and location
Plans
Sections
Details
Tolerances
ACI 117 for cast-in-place
ACI ITG-7 for precast
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26.4 Concrete materials and mixture requirements
COMPLIANCE REQUIREMENTS
Cementitious materials
Aggregates
Water
Admixtures
Steel fibers
Concrete mixtures
Proportioning
Mixture characteristics
DESIGN INFORMATION
Concrete mixtures
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26.4 Concrete materials and mixture requirements
COMPLIANCE REQUIREMENTS
Cementitious materials
Aggregates
Water
Admixtures
Steel fibers
Concrete mixtures
Proportioning
Mixture characteristics
ASTM Standards
Exceptions
Make selections whereappropriate
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Ternary blend*
Adds ternary blended hydraulic cement*
Type IT (S>70)
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Add corrosion inhibiting admixture *
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26.4 Concrete materials and mixture requirements
COMPLIANCE REQUIREMENTS
Cementitious materials
Aggregates
Water
Admixtures
Steel fibers
Concrete mixtures
Proportioning
Mixture characteristics
fc at stages
Limits on SCMs
Proportioning method
Documentation
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Example from 301
ACI 318-14 ACI 301-10
Cementitiousmaterials
Maximumpercentof
totalcementitious
materialsbymass
Flyashorotherpozzolans
conformingtoASTMC618 25
Slagcementconformingto
ASTMC989 50
Silicafumeconformingto
ASTMC1240 10
Totalofflyashorother
pozzolansandsilicafume 35
Totalofflyashorother
pozzolans,slagcement,and
silicafume
50
Table26.4.2.2(b)Limitsoncementitiousmaterials
forconcreteassignedtoExposureClassF3
Cementitiousmaterials
Maximumpercentof
totalcementitious
materialbyweight
Flyashorotherpozzolans
conformingtoASTMC618 25
Slagcementconformingto
ASTMC989 50
Silicafumeconformingto
ASTMC1240 10
Totalofflyashorother
pozzolans,slagcement,andsilicafume
50
Totalofflyashorother
pozzolansandsilicafume 35
Table4.2.2.7.b.2Maximumcementitious
materialsrequirements forconcreteexposedto
deicingchemicals
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26.4 Concrete materials and mixture requirements
DESIGN INFORMATION
Concrete mixtures Based on exposure
fc & test age
Maximum w/c m
Aggregate size
Air content
Chloride ion limits
Cementitious materialstypes
Calcium chloriderestrictions
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Example - Aggregate
Section 26.4.2.1
Select aggregate size. Do not copy to drawings
(4)Nominalmaximumsizeofcoarseaggregatenottoexceedthe
leastof(i),(ii),and(iii):
(i)onefifththenarrowestdimensionbetweensidesofforms
(ii)onethirdthedepthofslabs
(iii)threefourthstheminimumspecifiedclearspacingbetween
individualreinforcingbarsorwires,bundlesofbars,prestressed
reinforcement,individualtendons,bundledtendons,orducts
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26.5 Concrete production and construction
Design information
Field-cured cylinders
Temperature limits in hot and cold weather
Joint details and locations
Slab-on-ground diaphragms
Slab and column concrete integration
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26.5 Concrete production and construction
Compliance requirements
Material handling and batching
Placement and consolidation
Curing
Hot and cold weather procedures
Joint details and locations
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Tolerance on d and specified cover
Section 26.6.2.1(a), Design information
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d
>
8
in.
Specified
Cover
Specified
Cover
26.6.2.1(a) Tolerances on d and Specified Cover
in.
in.
No Specified
Tolerance
in.
in.
h
+1/2,
3/8
in.
for
12
in.