BS EN 12899-1:2001 pdf download

BS EN 12899-1:2001 pdf download.Fixed, vertical road traffic signs – Part 1: Fixed signs.
NOTE I Multiple light source circuits should be arranged so that in the event of one circuit fadure the sign wiN remain
illuminated as evenly as possible.
NOTE 2 For safety reasons, signs with multiple light sources circuits are recommended
5.4.5 ElectrIcal efficIency
Each individual light source shaM have an efficiency of at least 25 1mw’1.
NOTE The nominel life of bght sources should be specibd by the puflaser
6 Methods of test
6.1 Test conditions
Tests specified in 6.4. 6.5 and 6.7 shall be carried out at a temperature of (23 * 3) °C and a relative humidity of (50±5)%.
6.2 Test samples
Tests shall be conducted on finished signs or on prepared samples representative of finished signs.
6.3 Preparation of test samples and test panels
Test panels shall, unless otherwise specified, be prepared by cutting a piece 100 mm x 100 mm from samples selected according to 6,2. Test samples and test panels shall be conditioned in accordance with ISO 139 and shall be identified on the beck
6.4 Colour and luminance factor
Measurements shall be made in accordance wIth the procedures specifIed In CIE 15.2 usIng standard illuminant
D65 and CIE 4510 geometry.
6.5 Luminance of transilluminated signs
Measurements shall be made in accordance with the procedures specified In CIE 74.
6.6 Methods of calculation for the verification of structural performance
6.6.1 Calculations shall be in accordance with, and fulfil the requirements of ENV 1993-1-1:1992, ENV 1995-1-1 or ENV 1999-1-1 as appropriate! For metals the calculations shall be in accordance with elasticity theory.
6.6.2 No safety factor shall be applied when calculating the leading. Only shape factor for the Individual member shall be applied.
6.7 Methods of measuring deflection
6.7.1 Apparatus and materials
6.7.1.1 Sufficient bags of lead shot or dry sand to provide a uniformly distnbuted test load over the test sign, equivalent to the specified wind pressure.
6.7.1.2 Means of clamping the base of the sign post or posts so that they cannot rotate during the test The posts shall not be able to defied at the point where they are clamped due to any loading applied to the sign during the tests. The posts shall be mounted horizontaly with sufficient clear space beneath to permit foreseeable deflections of both the posts and any sign substrate attached to them.
6.7.1.3 Means of measuring sign and post deflection.
NOTE 1 Uniform distrtution of the test load may be ensured by dividing the surface under test into squares and loading the area of each square to the required amount Lead shot is recommended as It Is more stable when being placed In position!
NOTE 2 The expressions vertical ax’s. Thorizontal sio& and ‘horizontal axis” usea in 6.7.2 apply as t the sign was in its normal upright position.
6.7.2 Procedure
6.72.1 Externally Illuminated signs
a) Fix the sign to a single post, or as many posts of the same size as will be used In normal practice, using a fixing method representative of normal use.
When using a single post f’s the sign with its vertical axis in line with the centre line of the post.
when using two posts, the sign fixings shall be located at a distance from the edge of the sign of 1J5 or 300 mm, whichever is the smaler, where L is the greatest dimension of the sign measured at right-angles to the posts,
when using more than two posts. the outer fixings shall be located at a distance from the edge of the sign of US or 300 mm, whichever is the smaller, where I is the greatest dimension of the sign measured at right-angles to the posts. The remaining sign fixings shall be evenly spaced between the outer fixings.
b) mount the post in accordance with 6.7.1 with the sign above the posts and in the horizontal plane. The post shall be sufficiently long to enable clamping as required by 6.7.1; the dimension from the clamp to the top of the sign shall correspond to normal sign mounting height. The top of the post shall be in line with the top of the sign;
C) apply a uniformly distnbuted test load equivalent to the specified wind load over the area of the sign for 5 mm. With the load applied, measure the deflection of the sign at
— the extremities of the horizontal side for triangles; the extremities of the horizontal axis for other sign shapes;
— the mid-point between each pair of posts on the horizontal axis (where more than one post Is used);
— the deflection of the top of the post;
d) remove the load and after at least ten minutes measure:
— the residual deflection 01 the sign at the same points as before;
— the residual deflection of the top of the post;
e) remount the same test sign so that it is below the post and in the horizontal plane and repeat the above procedure for the back of the sign substrate;
f) measure deflection under load and residual deflection as before.
6.7.2.2 Transllluminated signs
Using the procedure set out in 6.7.2,1, measure
— deflection under load and residual deflection at the centre of the sign face;
deflection under load and residual deflection at the extremities of the horizontal axis of the back of the sign housing.