Design Solutions - Winter 2018 - 51

Storage conditions
must also meet the relative
humidity requirements. The
AWS-2 states the woodwork
should acclimate to the
building for 72 hours prior
to installation. This gives
the woodwork a chance
to "catch-up" to the new
environment's conditions
which can be expected to
differ from the one where it
was manufactured.
It is not advisable to
install woodwork that has
acclimated for at least 72
hours prior to installation
or to attempt installation in
a building environment that
is not properly closed in.
Missing windows and doors
will not make it possible
to control the temperature
or relative humidity of the
building's interior.
Often, woodwork
companies will include a
warranty with their proposal
in which these requirements
are detailed. Reading and
understanding the warranties'
conditions and limitations will
help the general contractor
and design professional
know how to prepare for
the day of installation.
Woodworkers will expect
general contractors to
take full responsibility
for dimensional change
problems by signing
a waiver if the proper
environmental conditions
outlined in the AWS-2
are not met prior to
installation. Often relative
humidity and temperature
reading logs from jobsite
measuring devices will
accompany the waiver.

RELATIVE HUMIDITY INFO

AWS-2, Section 2 Care
& Storage, starting on
page 37, contains the five
most valuable pages of
information that will help
your woodwork projects'
dimensional stability. AWI
strongly recommends
design professionals and
general contractors read and
understand this information
before moving to the
following pages stating
implications and warnings:
Page 42 of the AWS2, 2.4.4. - 2.4.4.6.1 gives
all the warnings regarding
installation/acclimation. This
is for everyone's use.
Page 47, right hand lower
corner of the page; paragraph
starting with bullet: "Dimensional Stability"
indicates what to expect.
Page 48, Species Chart:
Dimensional Stability on the
column on the right.
Page 54, right hand
column continuing on Page
55 left hand column goes into
a bit more detail.

In the end, there are plenty
of warnings about relative
humidity in the building.
Page 37, center column
describes who is responsible
for dimensional changes
in wood. And then there's
sunlight to consider.
THE BEST ADVICE

Before designing custom
wood items, investigate the
building owner's intentions
for the interior environmental
controls. "No relative
humidity controls planned"
is a red flag.
Understand the wood
species dimensional stability
and plan for expansion and
contraction with expansion
joints. Show expansion joints
on shop drawings.
If your design requires a
fabrication that falls outside
of anything referenced in
the Standards, have a mockup fabricated, place it in
its intended location and
observe how it performs.
Include the following
language in your specifications'
general conditions: "HVAC
system must be operating
consistently 24/7/365 prior
to woodwork installation.
Temperature and relative
humidity must be measured

and maintained at 25- 55% (or
other regional variant shown
in the AWS-2 page 38 and
verified prior to installation."
Woodwork installation
professionals must know
the requirements for proper
woodwork storage conditions
and acceptable handling
of woodwork as described
and recommended by the
Architectural Woodwork
Standards, Second Edition.
Prior to signing the
woodworker's contract,
review the woodwork
manufacturer's warranty
terms and conditions.
Contact AWI's education
department and request the
delivery of the AWI Design Pro
Series program # AWS2 2001
& 2002 Submittals, Care &
Storage at your firm by an
AWI manufacturing member.
This full hour of AIA Continuing
Education credit will help you
stay out of trouble!

winter 2018

I

designsolutions

51



Table of Contents for the Digital Edition of Design Solutions - Winter 2018

Contents
Design Solutions - Winter 2018 - Cover1
Design Solutions - Winter 2018 - Cover2
Design Solutions - Winter 2018 - 1
Design Solutions - Winter 2018 - 2
Design Solutions - Winter 2018 - Contents
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