NE3, Non-energy absorbing
The safest passive safe classification for medium and high speed roads.
NE3 is the safest passive safe classification for medium and high speed roads. The impact speed of non-energy absorption (NE), combined with the 3rd occupant safety level, demand special requirements of a column. Sapa Pole Products has developed a special shear-off solution. This in-built solution is unique, as it will shear-off in the event of an impact, and is unaffected by the direction of the impact. The solution is based just above the ground level of the column.
To rule out deviations in the soil type (compared to the test determinants), the influence of soil variables can be minimized by installing the column into an over-sized plastic tube or ‘sleeve’. For shearing NE3 poles this can be done using a concrete element, for example. The element consists of at least 500 kg concrete of minimal C20/25 quality and creates a stabilising structure around a vertical column.
By positioning enough concrete around an NE3 column with a shear off construction (which was originally tested in Soil “S”), all the variables in the soil are eliminated. This guarantees the NE3 classification.