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All along the post, along the spine, there are studs or nubs that prevent the barbed wire or mesh from sliding up or down the post. They are generally designated as 1.01, 1.25 or 1.33, referring to the weight in pounds per lineal foot. They are commonly painted with a white tip on top; white improves the visibility of the fence line.
Picket fences are a type of fence often used decoratively for domestic boundaries, distinguished by their evenly spaced vertical boards, the pickets, attached to horizontal rails. Picket fences are particularly popular in the United States, with the white picket fence coming to symbolize the ideal middle-class suburban life.
Due to the excessive load requirements [2] of this type of railing system, post construction is critical to the success of cable railings.. Cable railing requires very rigid frames compared to many other types of railings due to the forces applied to the end posts by tensioning the cables.
The American Society of Civil Engineers (or ASCE) specified rail profiles in 1893 [20] for 5 lb/yd (2.5 kg/m) increments from 40 to 100 lb/yd (19.8 to 49.6 kg/m). Height of rail equaled width of foot for each ASCE tee-rail weight; and the profiles specified fixed proportion of weight in head, web and foot of 42%, 21% and 37%, respectively.
Simple split-rail fence Log fence with double posts (photo taken in 1938). A split-rail fence, log fence, or buck-and-rail fence (also historically known as a Virginia, zigzag, worm, snake or snake-rail fence due to its meandering layout) is a type of fence constructed in the United States and Canada, and is made out of timber logs, usually split lengthwise into rails and typically used for ...
Patented track rails are engineered specifically for overhead cranes and monorails. [9] [10] Unlike a symmetrical structural rail, the material in a patented track rail is placed where it is most effective allowing for a significant reduction in weight. The rails are engineered to be twice as strong as typical A-36 structural beams and have a ...
Also in that year a group of investors purchased the business. The result was a new company called American Crane Corporation. In 1998 Terex acquired American Crane Corporation. [7] American Crane gradually built its market share after the 1998 acquisition with an estimated 70 crawler cranes purchased in 1999. [8] [9]
Tie cranes are self-propelled and powered by a diesel engine, and usually weigh under ten tons and have a top speed of 20 to 25 mph. [2] The crane is normally capable of lifting at least 800 pounds, making it able to lift any type of size of tie. Some tie cranes are also equipped with clamps which grab onto the rails to stabilize the machine ...