CEMP-E
EI 02G001
01 July 1997
Table 2-4b. Amplitude Requirements, English Units.
300-720 RPM
720-1020 RPM
1020-1620 RPM
Frequency, RPM
Type of Pile and Soil
Amplitude inches
Steel Sheet Piling,
Open-end Pipe Piles,
H-Piles, and Other
Piles lighter than
80 lb/ft
Sandy Soils
--
0.63-0.80
0.32-0.50
Clayey Soil
--
0.80-0.93
0.50-0.63
Closed-end Steel Pipe
Piles lighter than
420 lb/ft
Sandy Soil
--
0.80-0.95
0.50-0.63
Clayey Soil
--
0.95-1.18
0.63-0.80
Reinforced Concrete
Piles, Square or
Rectangular Section,
Cross Sectional Area
less than 310 in
Sandy Soil
0.95-1.18
--
--
Clayey Soil
1.18-1.57
--
--
Reinforced Concrete
Cylinder Piles of
Large Diameter,
Driven with Soil
Plug Removed; other
pile profiles.
Sandy Soil
0.50-0.80
0.32-0.50
--
Clayey Soil
0.63-0.95
0.50-0.80
--
h. Driving Resistance. It is inevitable that the resistance experienced by the hammer/pile system will
vary as the soil varies on the jobsite and as the pile is being driven. Both low- and high-resistance situations
call for attention to special conditions. Although low and high resistance will be encountered in driving, pile
refusal should never be defined or required with impact hammers for blow counts in the low- or high-
resistance ranges as described below.
2-15
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