Design Solutions - Winter 2021 - 53

The maximum
allowable length
for an adjustable
shelf shall be
determined by the
shelf materials
modulus of elasticity
(MOE). This
Standard allows a
calculated defection
for adjustable
shelves at 6.4mm
(0.250 " ) based on
the formula shown
under 3.3.5.2(b).

Load Values of Drawer Boxes
expressed within the new Standard
are specific to referenced laboratory
tests conducted in accordance with
the AWI Test Methodologies. The
load values do not suggest service
loads nor shall they be construed as
suggesting normal casework usage
loads. Please note that load values
expressed within this standard are
specific to referenced laboratory tests

CABINET DRAWERS

CABINET SHELVES

Two methods for supporting
adjustable shelves are covered in the
new Standards. One uses the long,
metal, perforated strips into which
clips known as " shelf standards " are
inserted. The other is known as " line
boring, " which is a uniform row of holes
drilled in a line a maximum of 64 mm
apart from each other into which shelf
supports are fitted. The shelves rest on
those supports.
Product rules for metal shelf
standards and bored hole shelf
supports are found under 3.3.5.1
Shelves, Adjustable. The Standard
allows for the use of metal shelf
standards and line-bored shelf
supports at any product grade.
Load Values expressed within
the new Standard are specific to
referenced laboratory tests conducted
in accordance with AWI Test
Methodologies. The load values do not
suggest service loads nor shall they
be construed as suggesting normal
casework usage loads. Performance
Duty Level of shelf support system is
dependent upon the combination of
core materials and shelf suspension
hardware.
Figure 87 illustrates shelf spans and
shelf deflection.

When planning
the project, consider
the load of the drawer. Often, we think
of a drawer's strength in terms of the
weight-bearing capacity of the drawer
slide, and that's good, because the
proper load-bearing rating of a slide
assures us that the slide will not bind
or collapse if we put a drawer and its
contents under a load that falls within
the allowable weight for that slide. But,
what about the drawer bottom itself?
A drawer slide's capacity is only part of
the story, but the rating doesn't mean
much if the drawer box construction
method and materials are insufficient
to store the weight of the contents.

conducted in accordance with AWI Test
Methodologies. These load values do
not suggest service loads nor shall they
be construed as suggesting normal
casework usage
loads.
The new
AWI Standard
for Casework is
less restrictive
on joinery
requirements
making it
more possible
for the AWI
manufacturers'
standard method
of joinery to fit
the requirements
of the Standards.
The four new
Performance Duty
Levels express the
load requirements
only, not the
joinery method. In
winter 2021

I

designsolutions

53



Design Solutions - Winter 2021

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