Box Culvert Presentation
Box Culvert Presentation
Box Culvert Presentation
CONCRETE BOX
CULVERTS
OUTLINE
• Introduction
• Applications
• Manufacturing Methods
• Design Procedures &
Joints
• Installation
• Quality
• Summary
INTRODUCTION
Four-sided culverts
are typically referred
to as box culverts.
INTRODUCTION
• Standard box sizes: 3’ x 2’ to 12’ x 12’
in 1’ span and rise increments.
• Typically come in 6’ and 8’ lengths.
• Custom box sizes: Nonstandard sizing
is permissible and must be designed
per project design specification.
INTRODUCTION
• Three-sided structures are U-shaped
structures that may or may not have a
crown in the center.
INTRODUCTION
Typical small
stream crossing.
TUNNELS
Fast and
economical
method for
tunnels under
roadways, as in
this golf cart
tunnel.
TUNNEL & ESCAPE ROUTES
Provide for
emergency
egress, as with
this tunnel
underneath a
warehouse and
distribution
center.
STORMWATER DETENTION
Multicell box
culvert
installation to
economically
provide
storage of
storm water
runoff.
CUSTOM BOX SIZES
Custom
designed and
manufactured
box culverts are
available, as
with this
monolithic triple
cell structure.
BENDS CAN BE DESIGNED
MITERS & SIDE OPENINGS
THREE-SIDED STRUCTURES
• Placed on strip
footing and used for
short span bridges.
Large 3-sided
structure
w/precast
headwalls and
wing walls.
SHORT-SPAN BRIDGES
Roadway over
roadway
applications can be
accomplished with
long-span 3-sided
structures.
MANUFACTURING METHODS
Wet-Cast
• Typically cast on end using an inner and outer form.
• Blockouts / hole formers can easily be incorporated.
• Cast with conventional concrete or self-consolidating
concrete.
• Product cured in the form.
• Wet-cast is commonly used for sanitary applications.
MANUFACTURING METHODS
Dry-Cast (Machine Made)
• Product cast using mechanized equipment.
• Form vibrators consolidate zero-slump concrete between
core and jacket.
• Hole formers may be incorporated, or coring is done as
needed.
• The product is immediately stripped and the form is
reused.
• Products typically cured in a kiln, or a combination of
tarps and moisture curing is used.
• Surface may appear textured due to manufacturing
process.
DESIGN
• ASTM C 877
JOINTS – MASTIC/BUTYL
• ASTM C 990
JOINTS
• Closed cellular rubber (vinyl & nitrile elastomers).
• Physical properties of ASTM D1056 Type 2C-1 &
chemical resistance requirements of AASHTO
M198.
• Requires a joint gap.
• Soil tight only.
JOINTS
Female (groove) end