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I. DESIGN LOADING
- Top and bottom chord dead and live loads in pounds per square foot used in designing the
roof or floor truss. II. UNIT STRESS
INCREASE - This is a short term loading stress increase allowed for the lumber
and any fasteners in the lumber.
III. LUMBER SPECIFICATIONS -
Lumber size and structural grade required for each member of the floor or roof truss
design.
IV. PANEL POINT LOAD - The uniform
live and dead loads are transferred to panel points for determining axial forces.
V. AXIAL FORCE - The internal
force compression or tension, acting along the length of each member.
VI. GAGE - The gage of truss
plates used on the truss design. It could be either 20, 18, or 16 gage.
VII. RATING - The rating is the
particular truss plate holding ability in pounds per tooth. |
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VIII. HEEL
- The heel is the point on the truss where the top chord intersects the bottom chord. IX. SLOPE - The amount of vertical rise
compared to horizontal run of floor of roof truss members.
X. PANEL POINTS - The panel points
of truss denote the intersections of the webs with the chords.
XI. PEAK - The peak is the
intersection of two separate top chords generally at the centerline of the truss.
XII. SPLICE - The splice is the
point where two top chords or bottom chords are butted together to form a single member.
XIII. SPAN - The span is the
length of which the roof truss or floor truss has been designed.
XIV. NOTES/DISCLAIMER BLOCKS -
Some notes that apply to all truss designs. |
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SUCCESSFUL DESIGN of
FLOOR/FLAT or ROOF TRUSSES