Rectangular Main Roads Pits & Lids

As well as the T60 & T100 pit ranges, Tri Underground are a manufacturer and supplier of the P1, N1/3, P4 and P8 type pits to suit the Main Roads network. These are all Main Roads approved pits that meet MRTS91 and made to suit SD1631. The relevant TRI Tuff Type 4 and Galvanised Steel Lids options are manufactured to suit SD1632, SD1633 and SD1634. Type 7 pits, lids and infill lids to suit are available upon request.