FEATURES:

• The Standard Penetration Test, or SPT, is the most widely used in-situ test throughout the world, as
an indicator of the density and compressibility of granular soils. It is also commonly used to check the
consistency of stiff or stony cohesive soils and weak rocks. Estimation of the liquefaction potential of saturated
granular soils for earthquake design is often based on these tests. Available design methods for both shallow
and deep foundations rely heavily on SPT results.
• The test consists of driving a standard 50-mm outside diameter thickwalled sampler into soil at the bottom
of a borehole, using repeated blows of a 63.5 kg hammer falling through 760 mm. The SPT N value is the
number of blows required to achieve a penetration of 300 mm, after an initial seating drive of 150 mm. 

Comprise:

1. SPT-AS SAMPLER ASSEMBLY - CONSIST OF:
SPT-AS1 Split-Barrel Sampler, Hardened machined steel,
1 3/8’’ id., 18’’ length
SPT-AS5 STP Plastic Catcher
SPT-AS2 SPT Adapter SPT-AS6 SPT Cutting Shoe
SPT-AS3 A pair of SPT Split Spoons SPT-AS7 SPT Nose Cone
SPT-AS4 SPT Steel Catcher SPT-AS8 Sampling Rod, set of 20 Steel pipe,
1.5 meter length
2. SPT-AD DRIVE WEIGHT ASSEMBLY - CONSIST OF:
SPT-AD1 Hammer, steel, 63.5 kg weight SPT-AD3 Guide Rod, Steel, 76.2 cm drop height
SPT-AD2 Anvil, Machined steel

3. Accessories and spare parts:

SPT-AT1 Tripod stand, steel pipe SPT-AT4 Vertical Guide, Machined steel
SPT-AT2 Rope, 3/4'' x 15 metre SPT-AT5 Pipe Wrench, set of two 24’’ length
SPT-AT3 Pulley, 20 cm diameter SPT-AT6 Motor hoisting machine

Heavyweight dynamic penetrometer gasoline-engine mass of 63.5 kg (machine operated):

Standard penetration testing equipment(SPT):