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DS-65. This photo shows a cross section piece of timber fastened inside a steel frame, lying lengthwise from top to bottom on a concrete surface. The steel frame itself is fastened to the concrete surface, and four cross bar are bolted across the top of the piece of timber holding it in its place. There exists an eye-hook run through the top of the timber with a pulley cable and hook attached to this eye-hook. The timber has split along the length of its grain, down its center and has cracked along its left-hand side as the right hand side of the timber was being forced against the steel frame.
DS-65 closeup. This photo shows a closeup of a cross section of timber fastened in a steel frame, which in turn is fastened to a concrete surface. Two of the four cross bars are visible in this closeup. The timber has snapped, the timber cracking beginning between the first and second cross bar moving in a diagonal fashion three quarters of the way through the width of the beam.
Grade 1D. This photo shows a cross section piece of timber fastened inside a steel frame, lying lengthwise at a slight angle from top to bottom on a concrete surface. The steel frame itself is fastened to the concrete surface, and four cross bar are bolted across the top of the piece of timber holding it in its place. There exists an eye-hook run through the top of the timber with a pulley cable and hook attached to this eye-hook. The timber has split along its left-hand side severely as the right hand side of the timber was forced against the steel frame.
Grade 1D closeup. This photo shows a closeup of a cross section of timber fastened in a steel frame, which in turn is fastened to a concrete surface. Only one of the four cross bars are visible in this closeup. The fracture begins and remains nearly parallel with the visible cross bar, splitting the timber straight across the width of the beam.
Grade 1. This photo shows a cross section piece of timber fastened inside a steel frame, lying lengthwise from top to bottom on a concrete surface. The steel frame itself is fastened to the concrete surface, and four cross bar are bolted across the top of the piece of timber holding it in its place. There exists an eye-hook run through the top of the timber with a pulley cable and hook attached to this eye-hook. The timber has split along the length of its grain, down its center and has cracked along its left-hand side as the right hand side of the timber was being forced against the steel frame.
Grade 1 closeup. This photo shows a closeup of a cross section of timber fastened in a steel frame, which in turn is fastened to a concrete surface. Only one of the four cross bars are visible in this closeup. The timber has snapped, the timber cracking beginning between the first and second cross bar moving in a diagonal fashion three quarters of the way through the width of the beam.
FHWA-HRT-05-096
