Anyone have a working interlocking system for crawling boards.

I have pieces of meranti with handles which we use to slide around in the ceiling space... however with installing cctv ...network and alarm wires ...its becoming a bit of a waste of time trying to slide with boards.

I want to find a way to clip boards together to make a walk way for the length of the roof space and adjustable crossbeams to get to those really tight spaces... without falling through the ceiling...which can be removed when the project is complete.

It would be a simple task if there were no ceilings installed or pipes on top of the beams.

It is also not a big deal in new houses... where the beams are strong with no wood rot.

Working in older houses ...there are a few challenged ... that old dust will turn a strong healthy team into a bunch sick coughing weenies within a day or 2 ... the older roof spaces have bigger open spaces ...however the spacing is wider and weaker...add 50 degree + temperatures ...pink aerolite...rotten beams and old dust you in for a really crap day at work.

We have big fans lights and need to come up with a better crawling board system to make the day a little more pleasant.