Precast Concrete Box Sections were developed in the 1970’s to provide
an alternative to cast-in-place structures. Precast boxes have the
advantage of plant control of quality. Precast boxes have the further
advantage of being quickly installed, thus reducing time delays during
construction. Finally, where clearance problems, minimum cover or
special waterway requirements are involved, concrete box sections are often
a readily solution.
Applicable Specifications and Recommended Use
ASTM C 789 Precast Reinforced Concrete Box Sections for
Drain, and Sewers
C 789 Box Sections are used in sizes of span and rise from 3' x 2' to 10' x 10'
for earth covers over 2'. Joints provided utilize male and female type
ends with cement mortar or mastic compound joints. Box sections are used
where special hydraulic requirements or cross-sectional shapes are encountered
(such as limited head room). They offer the advantages of precast products
over cast-in place construction through low installation costs and minimum inconvenience
of weather and traffic delay. Box units may be used in parallel for multi-cell
installations. For any project the use of precast concrete pipe, which
has recognized superior hydraulic, structural, and construction advantages, should
be thoroughly evaluated.
ASTM C 850 Precast Reinforced Concrete Box Sections for Culverts, Strom
Drains and Sewers With Less Than 2’ of Cover Subjected to Highway Loadings
C 850 box sections are used in sizes of span and rise from 3' x 2' to 12' x 12'
with less than 2' of cover. Joints provided utilize male and female type
ends with cement mortar or mastic compound joints. The joint shall be capable
of transferring a shear load through the top of slab of adjacent units. Box
sections are used where special hydraulic requirements and minimum cover are
encountered. They offer the advantage of precast products over cast-in-place
construction through low installation costs and minimum inconvenience of weather
and traffic delay. Box units may be used in parallel for multi-cell installations.
ASTM C 1433 Standard Specification for Precast Reinforced Concrete Box Sections For Culverts, Storm Drains and Sewers.
C1433 Specification covers single-cell precast reinforced concrete box sections intended to be used for the construction of culverts for the conveyance of storm water, industrial wastes and sewage.
Cement Mortar and Mastic Compound
All pipe, special shapes and boxes are available with tongue and groove
joints that may be packed with cement mortar, filled with a preformed plastic
gasket sealing compound, or a trowel applied mastic compound. Such
joints have a successful experience record and are generally used for storm
sewer construction. Properly applied mastic joint fillers provide
flexibility without impairing water tightness.