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Bolts secure slab to canyon wall
Rock slab 19 ft thick, 180 ft long and 120 ft high, hanging on canyon wall above Nevada valve house at Hoover dam was separated by narrow open seam from rock abutment; to eliminate danger of falling 350 2-in. bolts up to 33 ft long have been placed on 7 1/2-ft centers to anchor slab to parent rock; seam has been grouted and drainage holes drilled to prevent water accumulation.
Bolts secure slab to canyon wall
Rock slab 19 ft thick, 180 ft long and 120 ft high, hanging on canyon wall above Nevada valve house at Hoover dam was separated by narrow open seam from rock abutment; to eliminate danger of falling 350 2-in. bolts up to 33 ft long have been placed on 7 1/2-ft centers to anchor slab to parent rock; seam has been grouted and drainage holes drilled to prevent water accumulation.
Bolts secure slab to canyon wall
Construction Methods Equipment
1954
4 pages
Article (Journal)
English
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