BS 8442:2006 pdf download

BS 8442:2006 pdf download.Miscellaneous road traffic signs and devices -Requirements and test methods.
5.2.1.2.1 Retroreflective sign face materials
6.2.1.2.1.1 Glass bead
When tested in accordance with BS EN 12899-1:2001, 5.2.1.2, the chromaticity and the luminance factor shall conform to BS EN 12899-1:2001, Table 5.
6.2.1.2.1.2 Microprismatic
When tested in accordance with BS 8408:2005, 5.2.1.1, the chromaticity and the luminance factor for non-fluorescent microprismatic material shall conform to BS 8408:2005, Table 2.
When tested in accordance with BS 8408:2005, 5.2.2.1, the chromaticity and the luminance factor for fluorescent microprismatic material shall conform to BS 8408:2005, Table 4.
5.2.1.3 Night-time chromaticity of microprismatic material
When tested in accordance with BS 8408:2005, 5.2.1.2, the chromaticity and the luminance factor for non-fluorescent microprismatic material shall conform to BS 8408:2005, Table 3.
When tested in accordance with BS 8408:2005, 5.2.1.2, the chromaticity and the luminance factor for fluorescent microprismatic material shall conform to BS 8408:2005, Table 5.
5.2.2 Photometric requirements
5.2.2.1 Glass bead sign face materials
When measured in accordance with the procedure in CIE 54.2, using
CIE standard illuminant A, the coeffIcient of retroreflection (RA) of
retrorefiective glass bead material shall conform to
BS EN 12899-1:2001, Table 8 or 9, as required.
5.2.2.2 Microprismatic sign face materials
Microprismatic materials shall be assessed and rated in accordance with the procedures in BS 8408. The materials shall have the characteristics specified by the purchaser [see 4.la) and BS 8408:2005, Annex I].
5.3 Physical performance
5.3.1 Salt spray resistance of microprismatic sign face materials
Microprismatic materials shall conform to BS 8408:2005, 4.3.2.
6.2 Visual performance of sign face material
The visual performance of the sign face material shall conform to 5.2.
6.3 Physical performance of the sign face
The physical performance of sign face material shall conform to 5.3. When tested in accordance with Annex D, the sign assembly shall not:
a) begin to overturn by rotating at the back of the base when the force is applied from the front;
b) begin to overturn by rotating at the front of the base when the force is applied from the back;
c) slide along the surface if the force is applied in either direction.
7 Portable barriers
7.1 General
NOTE Barrier units incorporating traffic signs intended to close a traffic lane, or guide traffic or pedestrians past works, are regulated by the Traffic Signs Regulations and General Direct ions 2002 [1].
Barrier units, comprising barrier boards, tapping rails, supports and bases, shall be capable of being incorporated into systems which are used to mark part of a highway which is closed to traffic or to guide traffic or pedestrians past an obstruction.
The barrier unit shall be constructed so as to allow the use of ballasting. The manufacturer shall indicate the minimum recommended ballast required, and its positioning on the barrier assembly’s supports, for the barrier assembly to resist the wind speed class(es) for which it is designed [see Table 2, 15.le] and Annex El.
The minimum recommended ballast required for the barrier assembly to resist Class A, Class B and Class C wind speeds shall be calculated using the methods described in Annex F.
7.2 Visual performance
The visual performance of any traffic sign incorporated into portable barriers shall conform to 5.2.
7.3 Physical performance
The physical performance of portable barriers shall conform to 5.3.
9 Manually operated portable “Stop/Go” signs
9.1 General
The sign shall be supported on a stand or pole constructed in such a way that the height to the centre of the sign measured from the road surface is between 1.2 m and 1.8 iii.
Where a stand is provided it shall be so constructed that the operator can rotate the sign about a vertical axis to present either face to an atjacent observer. A device shall be incorporated in the stand that will halt the movement of the sign in one direction, so that it presents only one of its faces, and will only allow it to revolve enough to present the other face before again being stopped.
The sign shall be fixed to the stand or pole in such a way that the fixing does not alter or obscure the layout or colouring on either side of the sign.