New Jersey's Transit Rail Bridges are currently under
refurbishment. This is a time consuming project as all the
materials used must be specially chosen to ensure the job is 'right
first time' so as to prevent any future disruption to the operation
The client awarded the contract (spray apply PmB waterproofing
system to the steel bridge decks) to PIM Corporation, Pitchmastic's
trained applicator in the New Jersey
area. This was the eighth contract in succession undertaken by PIM
using PmB on rail bridges.
Works began by sandblasting the deck to a suitable standard to
receive the polyurethane waterproofing membrane. The programme was
tight. The rail system carries over 128,000 commuters a day and
each bridge structure was expected to be refurbished and opened
within the day.
Working close to the high speed trains was an important safety
issue. As only one track could be closed at any one time the main
contractor provided a flagman to warn of oncomingtrains.
PIM applied the elastomeric thick film PmB coating (known as
Blueshield in the US) to 16 bridges requiring rehabilitation. After
the PmB membrane had fully cured,contractors reinstalled the tracks
and rock ballast and returned the track to service