Design Solutions - Winter 2021 - 55

Balanced Construction is covered
under AWI 300-2018 - Materials,
3.3.3(b). 3.4 Aesthetic is where the
visual quality of the casework is
defined by AWI's Aesthetic Grades,
Premium, Custom and Economy. See
3.4(b). Under heading 4.0 Figures /
Illustrations, you will find enhanced
illustrations that coordinate with Figure
references throughout the Standard.
A good example of this is Figure 86,
likely one of the most referenced
figures within the Standard. The figure
illustrates what is meant by the terms
" exposed exterior, " " exposed interior, "
" semi-exposed, " and " concealed "
surfaces. This can be a common area
of misunderstanding in casework
projects. Each of these areas may be
finished differently as called for by the
appropriate Aesthetic Grade. The great
news is that you can find the definitions
of each of these under heading 5.3
Surface Categories. Did you know the
backside of an applied drawer front is
considered an exposed interior surface?

Heading 3.4 Aesthetic features
tables and explanations such as this
that define the aesthetic qualities
of each casework part and grade
requirements. In the AWS2, both
particleboard and MDF core were
acceptable for Premium Grade. Real
differences between " Premium " grade
and " Custom " grade were very few. For
laminate casework, the main difference
between the two aesthetic grades
is seen in the drawer box and the
door and drawer fronts. For Premium
Grade, the drawer box must be HPDL
or melamine clad 7-ply veneer core
plywood and the doors and drawer front
faces must have the same material,
thickness, color, and pattern on both
the outside and inside faces. For
Custom grade HPDL laminate casework,
the drawer box can be 7-ply veneer
core, particleboard core, or MDF core.

For the doors and drawer front faces,
the inside face is only required to be the
same material type and thickness as the
outside face. So, the inside face can be
a solid color laminate as long as it's the
same thickness as the face. For drawer
box joinery, both Premium and Custom
require one of the following joinery
methods: dovetail, dowel or dowel screw,
biscuit spline, or lock joint and nailed.
The majority of other differences
between Premium Grade and
Custom Grade are mainly aesthetic
and are related to the size of gaps
and flushness tolerances at joints.
Please note, that when veneer cores
are specified for doors, they may be
susceptible to warp and shall not be
subject to warp/flatness tolerances
contained within the Standard.

winter 2021

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Design Solutions - Winter 2021

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