Building Design and Construction Handbook - Merritt - Ventech!

TABLE 6.15 Typical Pile Characteristics and Uses (Continued)
6.94
Pile type
Concrete filled
steel pipe piles Composite piles
Precast concrete
(including prestressed)
Maximum length Practically unlimited 55 m (180 ft) 30 m (100 ft) for precast
60 m (200 ft) for
prestressed
Optimum length 12–36 m (40–120 ft) 18–36 m (60–120 ft) 12–15 m (40–50 ft) for
precast
18–30 m (60–100 ft) for
prestressed
Applicable
material
specifications
Recommended
maximum
stresses
Maximum load
for usual
conditions
Optimum-load
range
ASTM A36 for core
ASTM A252 for pipe
ACI Code 318 for
concrete
0.40 ƒ y reinforcement �
205 MPa (30 ksi)
0.50 ƒ y for core � 175
MPa (25 ksi)
0.33 for concrete
ƒ� c
1800 kN (400 kips)
without cores
18,000 kN (4000 kips)
for large sections with
steel cores
700–1100 kN (160–250
kips) without cores
4500–14,000 kN (1000–
3100 kips) with cores
ACI Code 318 for
concrete
ASTM A36 for
structural section
ASTM A252 for steel
pipe
ASTM D25 for timber
Same as concrete in
other piles
Same as steel in other
piles
Same as timber piles for
wood composite
ASTM A15 reinforcing
steel
ASTM A82 cold-drawn
wire
ACI Code 318 for
concrete
0.33 unless local
ƒ� c
building code is less;
0.4 ƒ y for reinforced
unless prestressed
1800 kN (400 kips) 8500 kN (2000 kips) for
prestressed
900 kN (200 kips) for
precast
250–725 kN (60–160
kips)
350–3500 kN (80–800
kips)
Cast in place
(thin shell driven
with mandrels)
30 m (100 ft) for
straight sections
12 m (40 ft) for tapered
sections
Auger placed
pressure-injected
concrete (grout) piles
9–25 m (30–80 ft)
12–18 m (40–60 ft) for 12–18 m (40–60 ft)
straight
5–12 m (16–40 ft) for
tapered
ACI See ACIa 0.33 ; ƒ s � 0.4 ƒ y if
ƒ� c
shell gauge is � 14;
use ƒ s � 0.35 ƒ y if
shell thickness � 3
mm
0.225–0.4ƒ� c
675 kN (150 kips) 700 kN (160 kips)
250–550 kN (60–120
kips)
350–550 kN (80–120
kips)