Standard Penetration Test Set
Product Code : JA-ST-9836
The Standard Penetration Test Set (SKU JA-ST-9836) is used in site investigation to measure the penetration resistance of the ground. The standard penetration resistance, N, is the number of blows needed to drive a split spoon sampler 300 mm using a 63.5 kg hammer falling freely through 750 mm. N is related to the compactness of cohesionless soils and the consistency of cohesive soils, and it is used in foundation design and in assessing liquefaction resistance.
Specifications
Test values that define the set:
| Product | Standard Penetration Test Set |
| SKU | JA-ST-9836 |
| Test | Standard Penetration Test (SPT) |
| Hammer weight | 63.5 kg |
| Free fall height | 750 mm |
| Sampler | Split spoon sampler, driven 300 mm |
| Result | Number of blows N (standard penetration resistance) |
Applications of the SPT set
- Foundation design from borehole N values
- Assessing the liquefaction resistance of sands under earthquake loading
- Relating penetration resistance to the compactness of sands and the consistency of clays
- Collecting disturbed samples from the split spoon for classification
Scope of supply and ordering
The set is built around the 63.5 kg hammer, 750 mm drop and split spoon sampler; the rods and accessories included are listed on the quotation. Lead time and packing depend on the order size and are confirmed when we quote.
Frequently asked questions
How is the N value measured?
N is the number of blows needed to drive the split spoon sampler 300 mm into the soil, using a 63.5 kg hammer falling freely through 750 mm.
What do N values tell a designer?
They relate to the compactness of cohesionless soil and the consistency of cohesive soil, and are used in foundation design and liquefaction assessment.
Related products
The soil testing equipment range lists further items of this kind.
Request a quote
Enquiries for the Standard Penetration Test Set can be sent with the quantity needed through our contact page.
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