®
L a r g e S t r u c t u r e s S e t
V e r t i c a l L i f t D r a w b r i d g e
40
Vertical Lift Drawbridge Details
(*Do not overtighten the Sliding Connectors that grasp the vertical #6 Beams. The middle section must be able to
slide up and down the #6 Beam.)
Use cord and Cord Tensioning Clips to cross brace the tower and the tower support. For the hanging mass cord,
determine how long the cord must be so that the middle section can slide up and down on the #6 Beam on the out-
side of the tower while the hanging mass moves up and down inside the tower. Double that length. Thread the ends
of the cord through the #1 Beams at the top edge of the middle section. Fasten the ends of the cords to Cord Ten-
sioning Clips on the Half Round Connectors. Place the cords over the pulley, and hang the mass hanger from the
middle of the cord. Adjust the amount of mass on the mass hangers so that the middle section of the bridge can be
lifted or lowered easily.
FT
SL
SL
#3
#4
#2
#6
#4
#1
SL
Flex 3
Cord
Hanging
Mass
SL
#2
Cord
#3
#1
#1
#1
SL*
CT
SL
FT
HR
Pulley
AC
Pulley
Cord
#5
#6
#6
#4
Figure: Vertical Lift Drawbridge Detail
Figure: Vertical Lift Drawbridge Reverse View