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The wood moisture content is above 25% on a dry-weight basis; The environment is sufficiently warm; Oxygen (O 2) is present; Wood with less than 25% moisture (dry weight basis) can remain free of decay for centuries. Similarly, wood submerged in water may not be attacked by fungi if the amount of oxygen is inadequate. Fungi lumber/timber ...
A plank used in the repair of a ship. A plank is timber that is flat, elongated, and rectangular with parallel faces that are higher and longer than wide. [1] Used primarily in carpentry, planks are critical in the construction of ships, houses, bridges, and many other structures. [2] Planks also serve as supports to form shelves and tables.
When testing wood in lumber form, the Janka test is always carried out on wood from the tree trunk (known as the heartwood), and the standard sample (according to ASTM D143) is at 12% moisture content and clear of knots. [3] The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the ...
The main inspiration, apart from beauty, is that this is a more environmentally friendly method of construction (compared to epoxy and polyurethane methods) which uses fast-growing plantation wood such as paulownia, cedar, spruce, redwood, and, of course, balsa.
California incense-cedar Cupressaceae (cypress family) Chamaecyparis: cypresses; Chamaecyparis lawsoniana: Lawson's cypress; Port Orford-cedar Cupressaceae (cypress family) Chamaecyparis nootkatensis: Nootka cypress; Alaska-cedar; yellow-cedar Cupressaceae (cypress family) Chamaecyparis obtusa: hinoki cypress Cupressaceae (cypress family)
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RAF aircrew with one of their Bristol Beaufighters on a PSP airstrip at Biferno, Italy, August 1944. Marston Mat, more properly called pierced (or perforated) steel planking (PSP), is standardized, perforated steel matting material developed by the United States at the Waterways Experiment Station shortly before World War II, primarily for the rapid construction of temporary runways and ...
Cedar Rapids, Iowa: United States 12 June 2008: Railroad bridge During June 2008 Midwest floods: 0 killed, 0 injured Three of the bridge's four steel spans were swept into the river along with 15 CRANDIC rail cars loaded with rock The Cedar River was still swollen in this image taken 10 days after the bridge's collapse. Road bridge Studénka