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Symbols
Numbering System
Q General Safety Notes
PLATE LOCATION AND ORIENTATION
3/4 'Center plate on joint unless x, y
Failure to Follow Could Cause Property
offsets are
onsari roti -i
Dimensions are in it -in -sixteenths.
6-4-8 dimensions shown inff-in-sixteenths
Damage or Personal Injury
Apply plates to both sides of truss
1. Additional stability bracing for truss system, e.g.
and securely seat.
diagonal or X -bracing, is always required. See BCSII .
X716,
2. Never exceed the design loading shown and never
1 2 3
TOP CHORDS
stack materials on inadequately braced trusses.
C1 cxa
3. Provide copies of this truss design to the building
4
designer, erection supervisor, property owner and
0 WEBS ca
all other interested parties.
For 4 x 2 orientation, locate
W a 5 A 0
Ox ° a ++'' ; O
4. Cut members to bear tightly against each other.
plates 0-'4a from outside
edge of truss.
a '� e °
5. Place plates on each face of truss of each
oa cacs-a O
joint and embed full Knots and wane at joint
locations are regulated d b ANSI/TPII.
g Y
BOTTOM CHORDSS
•This symbol indicates the
required direction of slots in
8 7 6 5
6. Design assumes trusses will be suitablyprotected from
environment
connector plates.
the in accord with ANSIII.
`Plate location details available In MiTek 20/20
7. Unless otherwise noted, moisture content of lumber
software or upon request.
shall not exceed 19% at time of fabrication.
JOINTS ARE GENERALLY NUMBERED/LETTERED CLOCKWISE
AROUND THE TRUSS STARTING AT THE JOINT FARTHEST TO
8. Unless expressly noted, this design is not applicable for
PLATE SIZE
THE LEFT.
use with fire retardant or preservative treated lumber.
The first dimension is she width
CHORDS AND WEBS ARE IDENTIFIED BY END JOINT
NUMBERS/LETTERS.
9. Camber is a non-structural consideration and is the
4 x 4 perpendicular to slots. Second
responsibility of truss fabricator. General practice is to
dimension is the length parallel
c
amber for dead load deflection.
to slots.
10. Plate type, size, orientation and location dimensions
LATERAL BRACING
CONNECTOR PLATE CODE APPROVALS
shown indicate minimum plating requirements.
Indicated by symbol shown and/or
BOCA 96-31, 95-43, 96-20-1, 96-67, 84-32
11. Lumber used shall of the species and and
in all respects, equalal to or better than that
by text in the bracing section of the
specified.
output. Use T, I or Eliminator bracing
if indicated.
ICBO 4922, 5243, 5363, 3907
12. Top chords must be sheathed or purlins provided at
BEARING
SBCCI 9667, 9730, 96048, 9511, 9432A
spacing shown on design.
Indicates location where bearings
(supports) occur. Icons vary but
r
reaction section indicates joint
13. Bottom chords require lateral bracing at 10 ft. spacing,
or less, if no ceiling is installed, unless otherwise noted.
14. Connections not shown are the responsibility of others.
a
number where bearings occur.
15. Do not cut or alter truss member or plate without prior
Nil
approval of a professional engineer.
Industry Standards:
16. Install and load vertically unless indicated otherwise.
ANSI/TPII: National Design Specification for Metal
MiTek®
Plate Connected Wood Truss Construction.
DSS -89: Design Standard for Bracing.
BCSII : Building Component Safety Information,
Guide to Good Practice for Handling,
Installing & Bracing of Metal Plate
Connected Wood Trusses.
Mi ek Engineering Reference Sheef: M11.7473
0 2004 MiTek®
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