When animals are exposed to softwood shavings the aromatic hydrocarbons are absorbed through the respiratory tract and enter the blood. The acids given off by pine and cedar shavings are very damaging to the respiratory tract. These acids can actually destroy cells that line the lungs and trachea (2).For a complete summary of the respiratory toxicity of pine shavings, go to. .hen animals are exposed to softwood shavings the aromatic hydrocarbons are absorbed through the respiratory tract and enter the blood. The acids given off by pine and cedar shavings are very damaging to the respiratory tract. These acids can actually destroy cells that line the lungs and trachea (2).
Bowstring trusses are made with a curved top chord and a straight bottom chord. The top chords were originally made with multiple leaf chords where the curvature was cut into the solid sawn chord members.A second style of bowstring truss used glued-laminated chords. The top chord in these trusses was curved in the laminating process.While these trusses have carried the roof load for decades, it is not uncommon to receive calls regarding broken trusses following a heavy snow event.he top chords were originally made with multiple leaf chords where the curvature was cut into the solid sawn chord members. A second style of bowstring truss used glued-laminated chords. The top chord in these trusses was curved in the laminating process.
Confidence votes 79. There are two kinds of bows, and they are made with different kinds of strings. Violin bows: The musical bow, for violins was originally made from horse hair, but is now made primarily with synthetic fibers, such as specially treated nylon, so there will no static build up.oday most bow strings in archery are made of synthetic materials such as Dacron and Kevlar. In the last 10 years, hi tech materials with names like Spectra, Fastflight, and Dyneema to produce the top Olympic-type Archery equipment of today's archer.