Theatre Design & Technology - Summer 1992 - 59

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Canadian Wood Council
Lumber Data Book
A revised Canadian Lumber Data Book,
reflecting new design values is now
available from the Canadian Wood
Council. These new values can make a sign ificam difference in spans
permitted for Canadian
lumber.
ew design values
were recently determined
by testing full-sized
graded lumber, rather than the former
practice of using small, clear grained test
specimens. For this reason, more
accurate information on bending,
tension, compression and modulus of
elasticity of dimensional lumber has
allowed changes in design tables for
visually graded lumber, as well as some
adjustments in design values for
Machine Stress Rated (MSR) lumber.
This test program also indicates that
there is no significant design value
strength difference between o. 1 and
o. 2 grades, so new tables group them
together. Below is a typical example of
changes in the new values.
Old
2X4

Bending
Tension
Compression
MOE (x106)

o. 2

New
o. 1/ o. 2

(lb/sq in)

(lb/sq in)

1000
600
675

131 0
640
1265
1.4

1.3

mension Lumber Data Book is available
for $6.
For further information contact:
Canadian Wood Council, PO Box C88880, Seattle, WA 98138.
To order call: 1-800-531-3122.

NEW

PRODUCTS

Mutoh Fuzzy Logic PloHer
Mutoh America, Inc., has imroduced the
first line of pencil and pen plotters-XP500 Series-to employ "fuzzy logic," a
capability that enhances plotting speed
and performance.
Fuzzy logic involves a division of
mathematics which allows the computer
to expand beyond black and white, yes
and no answers. The computer can come
to logical conclusions even though the
information it receives is "fuzzy."
Borrowing from the successful
application of fuzzy logic in cameras,
consumer electronic products and
household appliances, Mutoh's XP-500
E-size and SP 501 D-size paper-moving,
cut sheet plotters demonstrate that fuzzy
logic also holds promise fot other
applications.
Utilizing a 32-bit CPU and a full
digital servo drive, plotter speed and
acceleration the maximum speed for
both units is 44.5 ips, along with a 4.2G
acceleration rate. The lower-end
product, the model iP-530 has been
replaced by the XP-500. The iP-530 had
speeds of only 27.8 ips and of only 2.1G
acceleration.
The XP-500 is also "media sensitive."
Upon loading a sheet of drawing media,
the units sense the media's weight-for
example, a heavy film as compared to a
lighr tracing paper-and automatically

In addition to the design value tables,
other information in the 65-page book
includes a description of Canadian
species groups along with definitions of
visual grades. Typical marks of all
Canadian lumber grading agencies
certified by the American Lumber
Standards Board of
Review are listed. Span
ROBERT
tables are included for
Rooring and ceiling joists.
The Canadian Di-

adjust the servo motors to compensate,
resulting in a more precise plor.
The units are HP-GL compatible
with a RS-232C standard imerface. RS422, GP-IB and Centronics interfaces
are optional.
The suggested list
prices for the SP-500 Esize and the XP-501 DSize units are $6,300
and $4,800 respectively.
For further information, contact: Mutoh
America, Inc., Department XP-PRl, 500 West Algonquin
Road, Mr. Prospect, IL 60056; 708-9528880.

Auo Enkasonic Sound
Control MaHing
This is an architectural product but
perhaps it could be used in theatrical
applications to deaden those platforms
that always drum when actors walk on
them.
Akzo Industrial Systems has JUSt
received approval from the International
Congress of Building Officials for it's
Enkasonic® Sound Control Matting.
The panels were developed to help
builders of multiple-story buildings. The
marring effectively inhibits sound
transmission through Rooring.
Enkasonic is a 0.4" thick composite
of nylon fibers which form a threedimensional geomatrix. This geomatrix
has a nonwoven fabric heat bonded to
the upper surface. It obstructs the
transmission of sound.
For further information about this
product, contact: Rod Whiting,
Price/Mc abb, One orrh Pack Square,
Ashville, C 28801; 704-255-2706.

Generic CADD 6.0
AutoDesk Retail Products introduces
new Generic CADD 6.0 which strengthens compatibility with

A/itoCAD®.

HELLER, EDITOR

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This new release is an
enhancement to Generic
CADD 5.0. In addition

TD&T

1992 SUMMER

57
Table of Contents for the Digital Edition of Theatre Design & Technology - Summer 1992
