UFC 4-150-07
19 June 2001
Table 5-2 provides a guide for estimating the time required to conduct
Level I and Level II surface and underwater inspections.
Level III inspections depend on the extent of existing damage, the type
of inspection techniques, and the equipment used (ultrasonic thickness
measurements, increment borings, caliper measurements). Therefore, estimates
of time for Level III inspection are not included in Table 5-2.
Table 5-3 shows daily rates for underwater inspection of piles and
bulkheads.
Table 5-2 Production Rate for Surface and Underwater Inspection of
Structural Elements
Structural Element
Inspection time per Structural Element
(minutes)
Level I
Level II
Surface Underwater Surface Underwater
30 cm (12 inch) steel H-pile
2
5
15
30
30 cm (12 inch)wide strip of steel
1
3
8
15
sheet pile
30 cm (12 inch) square concrete
2
4
12
25
pile
30 cm (12 inch) wide strip of
1
3
8
15
concrete sheet pile
30 cm (12 inch) diameter timber
2
4
10
20
pile
30 cm (12 inch) wide strip of
1
3
7
15
timber sheet pile
NOTE: This information is based on a 10 to 14 meter (11 to 15 yard) water
depth; 1 to 2 meter (3.1 to 6.6 feet) visibility; warm, calm water; moderate marine
growth about 5 cm (2 inch) thick; and an experienced engineering diver or diver
supervised by an engineer. For the Level II inspection, it is assumed that 1
meter (3.1 feet) of the structural element is in the splash zone, 30 cm (12 inch) at
mid-depth, and 30 cm (12 inch) at the bottom, and will be completely cleaned of
marine growth. It is also assumed that the most efficient method of removing
marine growth will be used.
5-5
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