BOS 74:2004
Pre-cast reinforced concrete culverts
Licence No : SM/07-09
Valid from 28 August 2007
Expires on 27 August 2010
BOS 76:2004
Pre-cast manhole sections and slabs
Licence No : SM/07-10
Valid from 28 August 2007
Expires on 28 August 2010
Bos 103:2005
Pre-cast concrete kerbs
Licence No : SM/07-11
Valid from 28 August 2007
Expires on 28 August 2010