PRECAST CONCRETE PILES: PART 4: PRECAST PRETENSIONED SPUN
CONCRETE PILES
(SPUN PILES) - CLASS A, CLASS B AND CLASS C The attached
amendment on MS 1314-4: 2004 has been approved by Technical
Committee on Concrete and concrete products. Date: 16 November 2012
Amd. 1 (1) Table 1 Classification of spun piles, page 2 1.1)
Existing Note will be numbered as Note 1. 1.2) Add Note 2 below the
table and should read as follow: Other pile driving methods may be
used subject to agreement between purchaser and supplier. 1.3) Add
Note 3 below the table and should read as follow: Concrete
strengths higher than 60 N/mm2 may be used subject to agreement
between purchaser and supplier. (2) Table 2. Standard sizes and
lengths of spun piles, page 3
2.1 Add new class of piles of Class C for diameter 250 mm, 300
mm and 350 mm in Table 2. The new addition requirements are as
follows:
Length of Piles (m) Outside diameter
(mm)
Class of pile
Nominal thickness
(mm) 6 9 12 15
250 B 55 O O O
C 55 O O O
300 A 60 O O O O
B 60 O O O O
C 60 O O O O
350 A 60 O O O O
B 70 O O O O
C 70 O O O O
2.2) Add Note 1 below the Table 2 and should read as follow:
Pile lengths exceeding 18m are subject to agreement between
purchaser and supplier. MS 1314-4: 2004 Amd. 1 Page 1 of 2
(3) Clause 6 (b), page 4 Replace the existing permissible
tolerances in pile cross sectional dimensions of wall thickness of
hollow section with the following: Cross sectional dimensions
Tolerances wall thickness of hollow section -3, +15 mm for all
types of piles. (4) Table 3. Cracking bending moment (Mc) and
factor 'f ' for prestress levels of 4.0, 5.0 and 7.0 N/mm for spun
piles, page 9. Add new class of piles of Class C for diameter 250
mm, 300 mm and 350 mm in Table 3. The new addition requirements are
as follows:
Nominal diameter
(mm)
Class of Pile
Minimum concrete strength (N/mm2)
Cracking bending moment (Mc)
(KNm)
Factor 'f '
Effective prestress(N/mm)
250 B 60 12.0 1.5 5.0 C 60 15.0 1.8 7.0
300 A 60 17.0 1.5 4.0 B 60 20.0 1.5 5.0 C 60 25.0 1.8 7.0
350 A 60 26.0 1.5 4.0 B 60 30.0 1.5 5.0 C 60 37.0 1.8 7.0
