Concrete inFocus - Spring 2017 - 37

nrmca in focus

ENGINEERING:
Specifications for Concrete Construction
Colin Lobo, Ph.D., P.E., NRMCA Senior Vice President, Engineering

specification is an explicit set of requirements to be satisfied by a material,
product, system or service (ASTM).
Material specifications establish compositional
and performance requirements for materials
and products used in construction, such as
for cement, ready mixed concrete and reinforcing steel. Construction specifications
state owner-established requirements to be
satisfied on a project. Construction specifications are developed by the design professional (architect/engineer) and are part of the
contract between the owner and contractor
and applicable stakeholders on the project.
Specifications are accompanied by drawings

and details related to the project. As part of the
final coordination of contract documents, the
A/E should ensure that the information stated
in specifications and drawings are consistent
without conflicting requirements. The A/E
should include requirements of the Building
Code, when applicable, in the construction
specification. The Building Code establishes
minimum provisions to protect public safety.
Requirements in project specifications should
therefore meet or exceed those in the Building
Code.
Another important aspect of specifications
is whether it states prescriptive or performance
requirements. A prescriptive specification

includes compositional details of materials
or means and methods of construction. The
intended performance related to the prescriptive requirement may or may not be defined. A
performance specification, on the other hand,
defines the needed outcome tied to acceptance
criteria without details of how it should be
achieved. An important principle here is the
synergy between responsibility and authority.
A performance spec provides the appropriate
authority with assigned responsibility to the
contractor to achieve the desired outcome.
A prescriptive specification, with a stated or
undefined performance outcome, does not.
Specifications that combine inconsistent
concrete INFOCUS

ı

37



Table of Contents for the Digital Edition of Concrete inFocus - Spring 2017

From the President’s Desk
Corporate Suite Column
Enviroscene Column
Strong and Efficient: Insulating Concrete Forms for Multifamily Residential Construction
Cut the Cost of Workers’ Compensation Insurance in the Concrete Industry
Engineering: Specifications for Concrete Construction
Predicting the Potential for Plastic Shrinkage Cracks
2017 Product Preview
Index of Advertisers
Concrete inFocus - Spring 2017 - belly1
Concrete inFocus - Spring 2017 - belly2
Concrete inFocus - Spring 2017 - cover1
Concrete inFocus - Spring 2017 - cover2
Concrete inFocus - Spring 2017 - 3
Concrete inFocus - Spring 2017 - 4
Concrete inFocus - Spring 2017 - 5
Concrete inFocus - Spring 2017 - 6
Concrete inFocus - Spring 2017 - 7
Concrete inFocus - Spring 2017 - 8
Concrete inFocus - Spring 2017 - 9
Concrete inFocus - Spring 2017 - 10
Concrete inFocus - Spring 2017 - From the President’s Desk
Concrete inFocus - Spring 2017 - 12
Concrete inFocus - Spring 2017 - Corporate Suite Column
Concrete inFocus - Spring 2017 - 14
Concrete inFocus - Spring 2017 - 15
Concrete inFocus - Spring 2017 - Enviroscene Column
Concrete inFocus - Spring 2017 - 17
Concrete inFocus - Spring 2017 - Strong and Efficient: Insulating Concrete Forms for Multifamily Residential Construction
Concrete inFocus - Spring 2017 - 19
Concrete inFocus - Spring 2017 - 20
Concrete inFocus - Spring 2017 - 21
Concrete inFocus - Spring 2017 - 22
Concrete inFocus - Spring 2017 - 23
Concrete inFocus - Spring 2017 - 24
Concrete inFocus - Spring 2017 - 25
Concrete inFocus - Spring 2017 - 26
Concrete inFocus - Spring 2017 - 27
Concrete inFocus - Spring 2017 - 28
Concrete inFocus - Spring 2017 - 29
Concrete inFocus - Spring 2017 - 30
Concrete inFocus - Spring 2017 - Cut the Cost of Workers’ Compensation Insurance in the Concrete Industry
Concrete inFocus - Spring 2017 - 32
Concrete inFocus - Spring 2017 - 33
Concrete inFocus - Spring 2017 - 34
Concrete inFocus - Spring 2017 - 35
Concrete inFocus - Spring 2017 - 36
Concrete inFocus - Spring 2017 - Engineering: Specifications for Concrete Construction
Concrete inFocus - Spring 2017 - 38
Concrete inFocus - Spring 2017 - 39
Concrete inFocus - Spring 2017 - 40
Concrete inFocus - Spring 2017 - Predicting the Potential for Plastic Shrinkage Cracks
Concrete inFocus - Spring 2017 - 42
Concrete inFocus - Spring 2017 - 43
Concrete inFocus - Spring 2017 - 44
Concrete inFocus - Spring 2017 - 45
Concrete inFocus - Spring 2017 - 2017 Product Preview
Concrete inFocus - Spring 2017 - 47
Concrete inFocus - Spring 2017 - 48
Concrete inFocus - Spring 2017 - 49
Concrete inFocus - Spring 2017 - 50
Concrete inFocus - Spring 2017 - 51
Concrete inFocus - Spring 2017 - 52
Concrete inFocus - Spring 2017 - 53
Concrete inFocus - Spring 2017 - Index of Advertisers
Concrete inFocus - Spring 2017 - cover3
Concrete inFocus - Spring 2017 - cover4
Concrete inFocus - Spring 2017 - divider1
Concrete inFocus - Spring 2017 - divider2
Concrete inFocus - Spring 2017 - 57
Concrete inFocus - Spring 2017 - 58
Concrete inFocus - Spring 2017 - 59
Concrete inFocus - Spring 2017 - 60
https://www.nxtbook.com/naylor/NRCQ/NRCQ0118
https://www.nxtbook.com/naylor/NRCQ/NRCQ0417
https://www.nxtbook.com/naylor/NRCQ/NRCQ0317
https://www.nxtbook.com/naylor/NRCQ/NRCQ0217
https://www.nxtbook.com/naylor/NRCQ/NRCQ0117
https://www.nxtbook.com/naylor/NRCQ/NRCQ0416
https://www.nxtbook.com/naylor/NRCQ/NRCQ0316
https://www.nxtbook.com/naylor/NRCQ/NRCQ0216
https://www.nxtbook.com/naylor/NRCQ/NRCQ0116
https://www.nxtbook.com/naylor/NRCQ/NRCQ0415
https://www.nxtbook.com/naylor/NRCQ/NRCQ0315
https://www.nxtbook.com/naylor/NRCQ/NRCQ0215
https://www.nxtbook.com/naylor/NRCQ/NRCQ0115
https://www.nxtbook.com/naylor/NRCQ/NRCQ0414
https://www.nxtbook.com/naylor/NRCQ/NRCQ0314
https://www.nxtbook.com/naylor/NRCQ/NRCQ0214
https://www.nxtbook.com/naylor/NRCQ/NRCQ0114
https://www.nxtbook.com/naylor/NRCQ/NRCQ0413
https://www.nxtbook.com/naylor/NRCQ/NRCQ0313
https://www.nxtbook.com/naylor/NRCQ/NRCQ0213
https://www.nxtbook.com/naylor/NRCQ/NRCQ0113
https://www.nxtbook.com/nxtbooks/naylor/NRCQ0412
https://www.nxtbook.com/nxtbooks/naylor/NRCQ0312
https://www.nxtbook.com/nxtbooks/naylor/NRCQ0212
https://www.nxtbook.com/nxtbooks/naylor/NRCQ0112
https://www.nxtbook.com/nxtbooks/naylor/NRCS0611
https://www.nxtbook.com/nxtbooks/naylor/NRCS0511
https://www.nxtbook.com/nxtbooks/naylor/NRCS0411
https://www.nxtbook.com/nxtbooks/naylor/NRCS0311
https://www.nxtbook.com/nxtbooks/naylor/NRCS0211
https://www.nxtbook.com/nxtbooks/naylor/NRCS0111
https://www.nxtbook.com/nxtbooks/naylor/NRCS0610
https://www.nxtbook.com/nxtbooks/naylor/NRCS0510
https://www.nxtbook.com/nxtbooks/naylor/NRCS0410
https://www.nxtbook.com/nxtbooks/naylor/NRCS0310
https://www.nxtbook.com/nxtbooks/naylor/NRCS0210
https://www.nxtbook.com/nxtbooks/naylor/NRCS0110
https://www.nxtbook.com/nxtbooks/naylor/NRCS0609
https://www.nxtbook.com/nxtbooks/naylor/NRCS0509
https://www.nxtbook.com/nxtbooks/naylor/NRCS0409
https://www.nxtbook.com/nxtbooks/naylor/NRCS0309
https://www.nxtbook.com/nxtbooks/naylor/NRCS0209
https://www.nxtbook.com/nxtbooks/naylor/NRCS0109
https://www.nxtbookmedia.com