| 1. Use a driving head (or cap) compatible with both the hammer and the
pile. Concentric alignment and proper dimensioning will transfer energy more efficiently
and minimize damage to the butt of the pile. A tapered cone (6"- 12" long)
providing a close internal fit facilitates entry and holds the pile butt centered for
axial alignment. |
|
2. Maintain axial alignment of adjoining sections. Monotube tapered and extension
sections can be
• shop assembled to custom lengths
(subject to shipping limitations)
• rack-assembled on the job site
• spliced in the leads. When splicing in the leads, the weight of the hammer is
usually enough to assure a snug fit prior to welding. (Never fire the hammer!) The
self-aligning telescopic Monotube splice shown below facilitates axial alignment. |
| 3. Use welding electrodes compatible with chemical and physical
requirements of the joint. E6010 and E6011 rods are recommended for adequate penetration
of the root pass. Alternately, an E7018 rod may be preferred by a welder experienced in
its use. Quality welds are critical to the ultimate performance of the driven pile. |
|
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Visual Inspection
With Monotubes, there is no guesswork. After being driven to
final penetration, each individual Monotube can be visually inspected its full length to
verify the integrity of the pile. No unknown distortion or reduction of area, no unknown
corkscrew or out of plumb piles, no tips curled, broomed or bent, or other uncertainties
ever unknowingly become part of a Monotube installation. Actual visual inspection is an
important and satisfying feature. |
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