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Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe sits ready to excate a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using the wider, larger bucket at mid left. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe excavates a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using a wider, larger bucket. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Trench shield/box constructed of side walls of double steel plates with hollow core, tapered cutting edges at bottom, and large diameter pipe interior spreaders to resist exterior soil pressures. The width of the shield is determined by length of spreaders, and lengths are easily changed, which makes shield width quite flexible. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Dark spots on side walls are rain drops on this rainy day. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe excavates a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using a wider, larger bucket. Bucket has picked up soil from bottom and is now raising it up to dump into excavation outside the shield. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe excavates a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using a wider, larger bucket. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe sits ready to excate a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using the wider, larger bucket at mid left. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Trench shield/box constructed of side walls of double steel plates with hollow core, tapered cutting edges at bottom, and large diameter pipe interior spreaders to resist exterior soil pressures. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Dark spots on side walls are rain drops on this rainy day. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe excavates a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using a wider, larger bucket. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe sits ready to excate a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using the wider, larger bucket at mid left. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe sits ready to excate a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using the wider, larger bucket at mid left. First Street, Ann Arbor, Michigan 2006.
Earthmoving/ trenching construction, safety: Caterpillar 320CL track mounted hydraulic excavator/backhoe sits ready to excate a bucket of soil inside trench shield/box. Trench shield extends from bottom of trench to above top of excavation and protects the workers inside it from possible trench wall cavein. Backhoe bucket is sized to fit interior width of shield. Primary excation was by this same backhoe using the wider, larger bucket at mid left. First Street, Ann Arbor, Michigan 2006.
See photo in original gallery.
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