OF STANDARD CONFIGURATION
- Pile capacities change with strand quantity, diameter,
location and concrete strength. A wide variety of pile
designs are used throughout North America, even within one
- The KIE-LOCK splice load bearing elements are
designed to meet strength requirements (see "Specs")
using the standard configuration and modifying main plate
thickness, size of locking bars, and size, number and length
of rebar anchor/pile end reinforcement.
- Calculations verifying the mechanical ability of the
load-bearing components to meet specified capacities in
tension, bending, and compression are submitted, with
detailed shop drawings.
- Rebar anchor/pile end reinforcement is designed to
ACI/AASHTO, DOT, and/or IBC building code requirements, and
calculations are included. The KIE-LOCK uses only
Dayton/Richmond threaded Dowel Bars which give 100% strength
of each rebar size, instead of cut threading rebar ends which
reduces the effective tensile area by one rebar size.
- There are no standard precast pile designs used throughout
North America. Pile designs tend to be regional and vary with
the customer. Therefore, it is not practical or economically
feasible to have tests for every pile design, project, or have
blanket certifications (such as IBC) that are meaningful.
- KIE-LOCK test
reports are representative and verify the design
1) University of Illinois (Gamble) 14" sq. splices.
2) Ecole Polytechnique (Houde & Roux) 14" sq. & 16"
3) Gerwick Eng. (Ben Gerwick) 12" sq. splices.
4) Hawaiian Dredge & Const. (Naaru Tower) 16" oct.
5) Haley & Aldrich (US Courthouse, Boston) 14" sq.
6) Florida DOT
Laboratory Tests of 24" sq. splices.
See "Contacts" for Test
- Studies by the National Bureau of Standards (Materials
Research, Metallurgy Div.) conclude that steel pilings are not
significantly affected by corrosion in undisturbed (anaerobic)
soils, regardless of soil types and properties. A copy of
this report is available.
- CalTrans reports of extraction of earthquake collapsed
Cypress Viaduct steel pipe piles in Oakland indicate that no
significant corrosion occurred in 35+ years despite presence
of high levels of chloride, sulfates, and low values of soil
resistivities. A copy of this report is available.
- A steel splice can be safely located in the concrete pile
zone that is in previously undisturbed (anaerobic)
soil, and below ocean and river scour lines. (See "Projects"
for some pier and bridge installations.)
- The KIE-LOCK has been used to connect
different pile sizes (20" sq. tops to 16" oct.
bottoms -- Keehi Interchange, Honolulu; and 16" sq. tops to
14" sq. bottoms -- Mission Bay, San Francisco -- see "Photos"
section) for higher pile moment at the top of the pile. This
approach is an opportunity for pile designers working with
seismic considerations to save client money, since pile
design moment load is maximum in the top 10-30 ft. and it is
unnecessary to keep the same moment capacity below that.
- The KIE-LOCK is a relatively ductile connection for seismic
area 3 and 4 considerations. Kobe results indicate that
concrete piles spliced with steel did not fail before
non-spliced piles did..
- The KIE-LOCK has been used to make up thousands of 16" oct.
3 segment, 270
ft. long piles; 7
segment, 180 ft. long piles (Keehi Interchange
1981-5); and 8
segment, 64 ft. long piles (San Francisco Airport
Expansion, 1997). No project has had a splice failure.
- KIE-LOCK splices can connect composite
piles, composite to concrete, and pipe
to concrete (a yet undiscovered combination by
designers that would save clients' cost).
- Think of a problem and my team will work with you to
solve it safely and cost-effectively.