Sr. Kosmos et Gl. Riskowski, MOMENT DEVELOPED BY ECCENTRIC BOTTOM CHORD SPLICE BOARD ON WOODEN TRUSSES, Transactions of the ASAE, 36(6), 1993, pp. 1895-1900
Truss analysis methods may assume that bottom chords without ceiling l
oads are only axially loaded and no moment is developed. However, on w
ide span wooden trusses, the bottom chord is occasionally spliced with
an additional board on the top edge of the bottom chord (fig. 1) whic
h adds eccentricity to the splice that may develop additional moment s
tress within the bottom chord. If significant moments develop because
of forces being transferred through the top splice board, they need to
be documented and accounted for in design practice. It was found that
under snow load conditions, the bottom chord and tension splice board
develop bending moments as well as axial load. Various simple Purdue
Plane Structures Analyzer (PPSA) analogs were compared to determine ho
w well they estimated axial forces and moments in the bottom chord and
the splice board.