Concrete inFocus - Fall 2017 - 31

IMAGE COURTESY OF BUILDBLOCK

IMAGE COURTESY OF LOGIX

Typical ICF wall.

ICF wall and floor components.

8. Substrate for attaching finish materials
9. Reinforced concrete structure
In other forms of construction, these functions are installed by
several different trades, usually at significantly added cost. General
contractors can realize a number of on-site efficiencies, including
fewer trades, reduced crew-size and accelerated construction schedules. Because construction schedules are usually much shorter with
ICF construction, the general contractor is able to finish on time
and within budget. The building owner is able to put the building
into service sooner, cutting short his financing costs and initiating a
quicker revenue flow.
There are many different ICF manufacturers with similar ICF
systems. The blocks range in size from 48 to 96 inches long and 12 to
24 inches high depending on the manufacturer. The most common
configuration of an ICF unit is made of two layers of 2-3/8-inch to
2-3/4-inch thick EPS insulation spaced 4, 6, 8, 10 or 12 inches apart
depending on design requirements. The most common spacing is
6 inches or 8 inches for most low to mid-rise buildings, but for taller
buildings, taller walls or exceptionally large loadings, thicker walls
are necessary. For simplicity, ICFs are generally called by the width of
cavity, hence an ICF with a 6-inch cavity is called a 6-inch ICF and
an ICF with an 8-inch cavity is called an 8-inch ICF and so forth.
ICF manufacturers have a variety of ICF blocks to accommodate any
design condition and have outstanding technical support, including
design manuals, design details, engineering support and all the test
reports needed for commercial construction, including fire, energy
and noise. They have special components, including straight blocks,
corner blocks, brick ledge, angled block, curved blocks and half height
units, minimizing the need for field modifications which further
reduces construction time.
Another benefit of ICFs is that construction can continue through
the coldest and hottest weather because of the insulating quality of the
ICF forms. This means that concrete will continue to gain strength
within the protective formwork despite freezing conditions and not
overheat during extreme summer conditions.
In general, ICF construction costs are about the same as wood, steel
or masonry construction, but because of the reduced construction time
of ICF construction it usually wins out. Building with large ICF units

instead of individual small framing elements such as dimensioned
lumber or cold formed steel studs saves on initial cost.

Floor Systems
In addition to ICF walls there are also ICF concrete floor and roof
systems. The concept is similar in that the ICF floor or roof is made
with rigid insulation to function as a one-sided form at the bottom
surface. The forms are installed to span between concrete walls,
reinforcing steel is placed and then concrete is placed over the forms.
The result is a reinforced concrete floor or roof with rigid insulation
on the bottom. Other types of floor systems often used in combination with ICF walls include precast hollow core plank and composite
concrete floors over steel joists.

Construction Process

IMAGES COURTESY OF NUDURA

The construction process is simple which is why ICF construction is so cost effective and helps reduce construction time. Once
the foundation or structural floor is in place, the following process
is followed:
Step 1: ICFs are stacked in the shape of the wall and openings for
windows and doors are formed using bucks made of treated wood
or plastic.

Construction process of ICF walls.
concrete INFOCUS

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31



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

From the President’s Desk
Corporate Suite
Enviroscene
2017 National Ready Mixed Concrete Association Fleet Benchmarking and Costs Survey
The Root Causes of Poor Communication
Insulating Concrete Forms for Commercial Construction
Engineering: Specifying for Performance
View from Capitol Hill: State of Play of U.S. Infrastructure
2017 Service & Supply Buyers’ Guide
2017 Products & Services Suppliers Guide
Index of Advertisers
Concrete inFocus - Fall 2017 - Intro
Concrete inFocus - Fall 2017 - bellyband1
Concrete inFocus - Fall 2017 - bellyband2
Concrete inFocus - Fall 2017 - cover1
Concrete inFocus - Fall 2017 - cover2
Concrete inFocus - Fall 2017 - 3
Concrete inFocus - Fall 2017 - 4
Concrete inFocus - Fall 2017 - 5
Concrete inFocus - Fall 2017 - 6
Concrete inFocus - Fall 2017 - 7
Concrete inFocus - Fall 2017 - 8
Concrete inFocus - Fall 2017 - From the President’s Desk
Concrete inFocus - Fall 2017 - 10
Concrete inFocus - Fall 2017 - Corporate Suite
Concrete inFocus - Fall 2017 - 12
Concrete inFocus - Fall 2017 - 13
Concrete inFocus - Fall 2017 - Enviroscene
Concrete inFocus - Fall 2017 - 15
Concrete inFocus - Fall 2017 - 16
Concrete inFocus - Fall 2017 - 17
Concrete inFocus - Fall 2017 - 2017 National Ready Mixed Concrete Association Fleet Benchmarking and Costs Survey
Concrete inFocus - Fall 2017 - 19
Concrete inFocus - Fall 2017 - 20
Concrete inFocus - Fall 2017 - 21
Concrete inFocus - Fall 2017 - 22
Concrete inFocus - Fall 2017 - 23
Concrete inFocus - Fall 2017 - 24
Concrete inFocus - Fall 2017 - 25
Concrete inFocus - Fall 2017 - The Root Causes of Poor Communication
Concrete inFocus - Fall 2017 - 27
Concrete inFocus - Fall 2017 - 28
Concrete inFocus - Fall 2017 - 29
Concrete inFocus - Fall 2017 - Insulating Concrete Forms for Commercial Construction
Concrete inFocus - Fall 2017 - 31
Concrete inFocus - Fall 2017 - 32
Concrete inFocus - Fall 2017 - 33
Concrete inFocus - Fall 2017 - 34
Concrete inFocus - Fall 2017 - 35
Concrete inFocus - Fall 2017 - 36
Concrete inFocus - Fall 2017 - 37
Concrete inFocus - Fall 2017 - 38
Concrete inFocus - Fall 2017 - 39
Concrete inFocus - Fall 2017 - Engineering: Specifying for Performance
Concrete inFocus - Fall 2017 - 41
Concrete inFocus - Fall 2017 - 42
Concrete inFocus - Fall 2017 - 43
Concrete inFocus - Fall 2017 - View from Capitol Hill: State of Play of U.S. Infrastructure
Concrete inFocus - Fall 2017 - 45
Concrete inFocus - Fall 2017 - 46
Concrete inFocus - Fall 2017 - 2017 Service & Supply Buyers’ Guide
Concrete inFocus - Fall 2017 - 48
Concrete inFocus - Fall 2017 - 49
Concrete inFocus - Fall 2017 - 50
Concrete inFocus - Fall 2017 - 2017 Products & Services Suppliers Guide
Concrete inFocus - Fall 2017 - 52
Concrete inFocus - Fall 2017 - Index of Advertisers
Concrete inFocus - Fall 2017 - 54
Concrete inFocus - Fall 2017 - cover3
Concrete inFocus - Fall 2017 - cover4
Concrete inFocus - Fall 2017 - OC1
Concrete inFocus - Fall 2017 - OC2
Concrete inFocus - Fall 2017 - OC3
Concrete inFocus - Fall 2017 - OC4
Concrete inFocus - Fall 2017 - OC5
Concrete inFocus - Fall 2017 - OC6
Concrete inFocus - Fall 2017 - OC7
Concrete inFocus - Fall 2017 - OC8
Concrete inFocus - Fall 2017 - OC9
Concrete inFocus - Fall 2017 - OC10
Concrete inFocus - Fall 2017 - OC11
Concrete inFocus - Fall 2017 - OC12
Concrete inFocus - Fall 2017 - OC13
Concrete inFocus - Fall 2017 - OC14
Concrete inFocus - Fall 2017 - OC15
Concrete inFocus - Fall 2017 - OC16
Concrete inFocus - Fall 2017 - OC17
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