Spots and streaks of sufficient size and density to severely mar the appearance of the wood.
Heavy timber construction
Use of heavy timbers, connected with bolting and metal plates at their intersections, for main structural pieces in construction. The heavy timbers carry the structural load so that studs are added to form partitions and not for weight bearing.
Heavyweight concrete
Used for radiation shielding, the concrete is made dense by addition of a heavy aggregate. Regular concrete weighs approximately 150 pounds per cubic foot while heavyweight concrete weighs 400 pounds per cubic foot.
Hectare
A measurement, equaling 2.471 acres or about 107,637 square feet or 10,000 square meters.
Hectogram
Metric unit of weight, which equals 100 grams or 3.527 ounces.
Hectoliter
Metric unit of volume, which equals 100 liters or 26.4 gallons.
Hedge
Suitable trees, shrubs, or bushes planted relatively close together so that the branches will intertwine to provide a barrier fence for a windbreaker or privacy. Hedges can be any height or width depending on the plant material used. Generally they are long lived species.
Hedgerow
A row of closely planted shrubs, bushes, etc. forming a hedge, which can be used as a fence or barrier.
Heel
(1) The outer side of a pipe or conduit bend. (2) The bottom of a metal lathe-cutting tool. (3) Bearing point on a rather or joist, etc. (4) Corner on the outside of a framing square. (5) Where the bristles on a paintbrush meet the handle.
Heel cutting
A short, side branch taken as a cutting with a small piece of the main stem. (Often taken with old rose cuttings.).
