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®
L a r g e S t r u c t u r e s S e t
B a lt i m o r e B r i d g e
28
Tied Arch Bridge Details
At the top of the Arch, use a Flat Round Connector and four Flex 3 Beams to form a cross brace.
Baltimore Bridge
Use 40 #3 Beams and twenty Straight Connectors to make twenty extra “#5 Beams”.
Use Flat Round Connectors and four Flexible #3 Beams to make four cross braces for the deck. Place one at each
end of the deck where it joins the end support and put the other two on both sides of the center of the deck.
Figure: Tied Arch Bridge Top Detail
#3
#3
#4
#4
#4
#4
#4
#4
#3
#3
F4
F4
F4
Flex 5
Flex 5
Flex 5
Flex 5
Flex 3
Flex 3
#4
#4
Flex 5
Flex 3
FT
F4
F4
F4
F4
FT
Figure: Baltimore Bridge
Flex 3
FT
#5
#5
#6
#6
#6
#6
#6
#4
#4
#4
#4
#4
#4
#4
#4
#3
#4
Flex 4
Flex 4
#5
Support the
slotted
masses on
a #4 Beam.