What is stress relaxation?
Stress relaxation is the gradual loss of stress in a material held at a constant strain, most importantly in prestressing steel.
What is relative humidity?
Relative humidity (RH) is the amount of water vapour in the air as a percentage of the maximum the air can hold at that temperature.
What is a try plane?
A try plane, or jointer plane, is a long hand plane used to plane timber flat and straight over its full length and to true up edges for jointing.
What is a screeding straightedge?
A screeding straightedge is a straight, stiff, light board or bar used to strike off screed, concrete or plaster to a flat, level surface.
What is a regula?
A regula is the short fillet in the Doric order below the taenia and directly under each triglyph, from which the guttae hang.
What is a rail in carpentry?
A rail is a horizontal timber member that connects the upright parts of a construction, such as the top, middle and bottom rails of a panel door.
What is reflection, absorption and transmission?
Reflection, absorption and transmission describe how much light or radiation striking a material is bounced back, taken in or let through.
What is reflective foil?
Reflective foil is an aluminium-faced membrane that reflects radiant heat, but it only works when it faces an air gap.
What are hairline fissures in natural stone?
Hairline fissures, called reeleger in Dutch, are fine, non-continuous cracks in natural stone that can make a block split unexpectedly.
Tackling damp in a crawl space: how to get it dry under your floor again
Fixing a damp crawl space? Remove the cause first, cover the soil with membrane or shells, and sort out the ventilation. A complete step-by-step plan.