1985 Ed.]
Building (Construction) Regulations
[CAP. 123
B 71
[Subsidiary]
(b) for a longitudinal reinforcement in a column, not less than 40 mm or the diameter of that reinforcement, whichever is greater:
Provided that in a column whose least lateral dimension is 200 mm or less and whose reinforcement does not exceed 15 mm in diameter the minimum cover shall be not less than 25 mm;
(c) for a longitudinal reinforcement in a beam not less than 25 mm or the diameter of that reinforcement, whichever is the greater;
(d) for any other reinforcement not less than 15 mm or the diameter of that reinforcement, whichever is the greater.
(2) Where reinforced concrete is exposed to the weather the minimum cover specified in paragraph (1) shall be increased by not less than 15 mm.
(3) Where reinforced concrete is cast in contact with earth the minimum thickness of cover shall be 75 mm.
(4) Where reinforced concrete (other than reinforced concrete piling) is cast against formwork and subsequently may be in contact with earth the minimum thickness of cover shall be 50 mm.
(5) The minimum cover to all reinforcement, including lateral L.N.95/75 reinforcement, in concrete piling shall be 40 mm.
(6) The Building Authority may require the cover to be increased in marine works or where the concrete is exposed to particularly corrosive conditions.
116. (1) Subject to the provisions of regulations 118 and 120 the compressive, shear and bond stresses in reinforced concrete shall not exceed the maximum permissible stresses specified in Table XXVII for the grade of concrete used.
Stresses in reinforced concrete.
TABLE XXVII
Maximum permissible stresses in ordinary and quality A concretes in reinforced concrete in MPa
13456 DesignationCompression due to bendingShearAverage bondLocal bond direct Grade I6.75.10.71.2 Grade II5.94.40.61.1 Grade III5.23.90.50.60.9 Grade IA10.07.60.90.91.5 Grade IIA8.56.50.80.81.4 Grade IIIA7.05.30.70.71.2593885
L.N. 294/76.
1985 Ed.]
Building (Construction) Regulations
[CAP. 123
B 71
[Subsidiary]
(b) for a longitudinal reinforcement in a column, not less than 40 mm or the diameter of that reinforcement, whichever is greater:
Provided that in a column whose least lateral dimen- sion is 200 mm or less and whose reinforcement does not exceed 15 mm in diameter the minimum cover shall be not less than 25 mm;
(c) for a longitudinal reinforcement in a beam not less than 25 mm or the diameter of that reinforcement, whichever is the greater;
(d) for any other reinforcement not less than 15 mm or the
diameter of that reinforcement, whichever is the greater.
(2) Where reinforced concrete is exposed to the weather the minimum cover specified in paragraph (1) shall be increased by not less than 15 mm.
(3) Where reinforced concrete is cast in contact with earth the minimum thickness of cover shall be 75 mm.
(4) Where reinforced concrete (other than reinforced concrete piling) is cast against formwork and subsequently may be in contact with earth the minimum thickness of cover shall be 50 mm.
(5) The minimum cover to all reinforcement, including lateral L.N.95/75 reinforcement, in concrete piling shall be 40 mm.
(6) The Building Authority may require the cover to be increased in marine works or where the concrete is exposed to particularly corrosive conditions.
116. (1) Subject to the provisions of regulations 118 and 120 the compressive, shear and bond stresses in reinforced concrete shall not exceed the maximum permissible stresses specified in Table XXVII for the grade of concrete used.
Stresses in reinforced
concrete.
TABLE XXVII
Maximum premissible stresses in ordinary and quality A concretes in reinforced concrete in MPå
1
Compression
4
5
6
1
3
Designation
due to bending
Shear
direct
Average bond
Local
bond
Grade I
6.7
5.1
Grade II
5.9
4.4
Grade III
5.2
3.9
0.5
Grade IA
10.0
7.6
0.9
Grade IIA
8.5
6.5
0.8
Grade IIIA
7.0
5.3
0.7
593885
0.7
0.8
1.2
0.6
0.7
1.1
0.6
0.9
1.0
1.5
0.9
1.4
0.8
1.2
L.N. 294/76.
No comments yet.
Private notes are available after approval.