Scala Penetrometer Kits and Accessories
Scala Penetrometer Kit
Scala Penetrometer Kit includes:
Extension rods are also available in different lengths from 800mm to 1.6M.
Probe rods and extension rods are numbered in sequence, so users do not need to have a tape measure for testing.
All our Scala rods have graduations marked on them.
The Scala Penetrometer offers users these main advantages:
Accessories and Spares
Select individual parts for your custom kit, or spares from the detailed price list.
A variety of extra-long probe rods are also available, from 1.2M to 1.6M, for quick testing without adding extra rods.
Penetrometer parts can be saved from unnecessary wear if operators use a penetrometer extractor instead of using the weight to back-hammer the probe out of the ground.
The Scala Penetrometer Extractor:
Technical Background and References
Useful Technical Information
We service and support all the equipment we sell.
When it is practical, we will get a damaged Scala kit back into service as cheaply as possible by straightening rods, getting broken thread out of handles, loosening seized-up rods and anvils etc.
The Scala Penetrometer was developed by A. J. Scala, who presented his first paper at the Second Australia-New Zealand Soil Mechanics Conference in 1956. His aim was to develop a simple in-situ test for pavement subgrade which would have good correlation with California Bearing Ratio, CBR.
Since then this test method has become very popular: the Country Roads Board (Victoria) in Australia produced Test Method CRB 402.01, and Standards New Zealand produced NZS 4402 Test 6.5.2:1998.
In addition the Building Research Association of New Zealand Information Bulletin 212, Feb 1979 explains the use of the Scala Penetrometer to establish whether the safe bearing pressure of the soil under a light building is adequate. This paper is based on the work of M. J. Stockwell from the Christchurch City Council, reported in his article Determination of Allowable Bearing Pressure Under Small Structures published in NZ Engineering, June 1977.
The result of all this work is that the Scala Penetrometer is now widely used in foundation checking for small buildings and in road construction. The initial research focused on clays and silty clays but further work has extended its usefulness to sands as well.
Building Research Association (BRANZ) Guide to the Use of a Scala Penetrometer
NZS 4402 Test 6.5.2:1998
NZS 3604:2011 3.3 Test Method for Soil Bearing Capacity
Scala to CBR Conversion: