The lightweight metal construction system begins with a beam formed from a single piece of cold formed sheet steel or other sheet metal which is bent lengthwise along four lines to form a triangular cross section with {HEAD ~ two wings}, side by side, extending from {TAIL ~ its apex} 
extending from
The lightweight metal construction system begins with a beam formed from a single piece of cold formed sheet steel or other sheet metal which is bent lengthwise along four lines to form a triangular cross section with { HEAD ~ two wings } , side by side , extending from { TAIL ~ its apex }
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