EI 02G001
CEMP-E
01 July 1997
level can last for many years without treatment. TIM piles are typically installed with the aid of jetting in a
sand foundation and predrilling in a clay foundation. A creosote pressure treatment should be applied to
piles that extend above the groundwater level or installed in a marine environment to protect against borers
and decay.
Table 1-1. Timber Pile Specifications.
LENGTH
9 - 18 M (30 - 60 FT)
MATERIAL
ASTM D 25
SPECIFICATION
DESIGN
DOUGLAS FIR - 8.27 MPA (1.2 KSI)
STRESSES
RED OAK
- 7.58 MPA (1.1 KSI)
SOUTHERN PINE - 8.27 MPA (1.2 KSI)
EASTERN HEMLOCK - 5.52 MPA (0.8 KSI)
DRIVING
3 TIMES THE ABOVE DESIGN STRESSES
STRESSES
DESIGN LOADS
100 - 500 kN (10 - 50 TONS)
DISADVANTAGES
DIFFICULT TO SPLICE
VULNERABLE TO DAMAGE IN HARD DRIVING
TIP MAY HAVE TO BE PROTECTED
VULNERABLE TO DECAY UNLESS TREATED AND PILES ARE SUBMERGED
OR DRY SUBJECT TO MECHANICAL WEAR
LOW INITIAL COST
ADVANTAGES
PERMANENTLY SUBMERGED PILES ARE RESISTANT TO DECAY
EASY TO HANDLE
READILY CUT TO REQUIRED LENGTH
FRICTION PILES IN SAND, SILT, OR CLAY
APPLICATION
NOT RECOMMENDED IN DENSE GRAVEL OR TILL
ILLUSTRATION
1-2
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