Since the dawn of road engineering, wooden shims have been the simplest way to level up ironwork supports like manholes or gully gratings with a new road surface. A thin slice of tree was perfectly adequate road construction material in a world where the heaviest thing on the road was the local squire on his horse.
Sadly, good old wooden shims simply don’t get on with today’s SUVs, to say nothing of transit vans, skip loaders and articulated lorries.
Although wooden shims (liberally slathered in cement) seemed to hold sway for much of the 20th Century, they were never ideal. The wood eventually rotted away, leaving dangerous cavities, road surface failure and endless queues of angry drivers.
Back in the early 1980s some very clever people decided to do something about it. After two years of development work a new product was launched which has had a profound effect on road repair.
Shimpac planks are thin strips that are laid around drain holes, manholes and any sort of hole that needs to be levelled and seated to the correct road height. By building up thin strips the levelling can take into account road cambers and other inclines. So far, it sounds remarkably similar to wooden shims, but there are some key differences.
Shimpac doesn’t rot and it doesn’t decay. It is made of a mix of fibre and concrete that has terrific compression resistance, as well as excellent lateral strength and sheer resistance combined with a bit of shock absorption; making it perfectly capable of putting up with decades of modern road traffic. In fact, over the 30 odd years that the boards have been in use, there haven’t been any examples of them failing.
Shimpac boards are available in a five standard thicknesses. The three thinnest (up to 25mm) can be scored and snapped to size making them exceptionally easy to use. The thicker Shimpac boards can be cut on site with a Stihl saw / disc cutter or Tungsten tipped saw. They can be laid with fast drying cement making the job of seating ironwork quicker and easier than ever before.
Due to their cost effectiveness and ease of use, Shimpac boards have become part of the standard toolkit of almost every truly professional road worker. To get your Shimpac boards delivered directly to where you need them Call George Lines today.