What is a spiegeloplegging?
A spiegeloplegging is a Dutch bearing detail for hollow-core slabs in which the insulation on the underside of the slab is held back at the supports.
What is a mirror vault?
A mirror vault (Dutch: spiegelgewelf, German: Spiegelgewölbe) is a cloister or trough vault cut off at the top by a flat central panel, the mirror.
What is a pivot hinge (speun)?
A pivot hinge (Dutch: speun) lets a cabinet door or window turn on a pin at the top and bottom, so it can open to about 180 degrees.
What is a spekband?
A spekband is a horizontal band in a brick façade in a different material or colour, traditionally light natural stone. Typical of Dutch Renaissance architecture.
What is a mortar bridge (mortar snot)?
Mortar snots are mortar squeezed out of the joints into a cavity. When they touch the insulation or inner leaf, a mortar bridge forms, causing damp and heat loss.
What is a haunched tenon (spatpen)?
A haunched tenon has a small extra tongue, the haunch (Dutch: spatpen), beside the main tenon of a mortise and tenon joint, used in window, door and frame corners.
What is horizontal thrust?
Horizontal thrust (Dutch: spatkrachten) is the sideways force from sloping or curved structures such as roofs and arches that pushes walls and piers outwards. Causes and solutions.
What is a trussed roof?
A trussed roof is a roof structure of many light trusses at close spacing, usually prefabricated with nail plates. Build-up, use and points to watch.
What is a stress crack?
A stress crack is caused by internal or external stresses in glass, plastic or metal, for example due to temperature differences or stress corrosion.
What is pressure relief dewatering?
Pressure relief dewatering lowers the water pressure in a deep aquifer so that the base of an excavation does not heave. How it works, risks and points to watch.