What is a plate dowel?

A plate dowel is a flat steel dowel in a floor joint that transfers shear between slabs while allowing them to shrink freely in two directions.

What is a slab floor?

A slab floor is a floor formed by a solid reinforced concrete plate that spans in two directions, cast in situ or delivered as a precast element.

What is a polymer?

A polymer is a substance whose molecules are long chains of a repeated building block — the basis of nearly every plastic, adhesive and sealant in construction.

What is polygonal?

Polygonal means many-sided: built up from straight sides and angles, such as an octagonal tower, a polygonal apse or polygonal masonry.

What is polyester?

Polyester is a synthetic resin that cures chemically and, reinforced with glass fibre, is used for gutters, rooflights, tanks and facade elements.

What is polychrome?

Polychrome means many-coloured: a building, sculpture or finish made up of several colours, as opposed to monochrome.

What is a Polonceau truss?

A Polonceau truss is a 19th-century roof truss of two trussed rafters linked by a horizontal tie rod, spanning widely with very little material.

What is polishing?

Polishing is smoothing a surface with progressively finer abrasives until it reflects light — applied to natural stone, terrazzo, concrete and metal.

What is a polder roof?

A polder roof, or blue roof, is a flat roof that temporarily stores rainwater in a retention layer and releases it slowly or under control.