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The weight designations originated with organic base felt weighing 15 or 30 pounds per 100 sq. ft. (6.8 kg or 14 kg per 9.3 m 2). However, modern base felts are made of lighter-weight fibre, so the weight designations, though common colloquially, are no longer literally accurate. [ 2 ]
Permeability can be reported in perms, a measure of the rate of transfer of water vapor through a material (1.0 US perm = 1.0 grain/square-foot·hour·inch of mercury ≈ 57 SI perm = 57 ng/s·m 2 ·Pa). American building codes started classifying vapor retarders in the 2007 IRC supplement.
In Poland painting the whole trunk is also said [citation needed] to help keep the body of the tree cool in late winter and early spring months and hence help prevent fruit trees from blooming too soon, i.e. when warm sunny days could promote rapid tree warming, rising sap and bloom and intermittent frosty nights could damage outer tree rings ...
Hong Kong law Chapter 123F, Building (Planning) Regulations, Regulation 23 sect 3 sub-paragraph (a) defined that: Subject to sub-paragraph (b), for the purposes of regulations 19, 20, 21 and 22, the gross floor area of a building shall be the area contained within the external walls of the building measured at each floor level (including any floor below the level of the ground), together with ...
This type of flooring is typically used indoors and can be used in both high and low-traffic areas. It typically lasts for 15–18 years before it needs to be replaced. The quality of a carpet is usually measured in face weight, or how many fibers there are per square inch. The higher the face weight the more plush a carpet will feel. [3]
Various types of models and moulds are made with plaster. In art, lime plaster is the traditional matrix for fresco painting; the pigments are applied to a thin wet top layer of plaster and fuse with it so that the painting is actually in coloured plaster. In the ancient world, as well as the sort of ornamental designs in plaster relief that ...