1964_BUILDING_(CONSTRUCTION)_REGULATIONS — Page 3

HK Historical Laws 香港歷史法例 All AI Reviewed
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1985 Ed.]

Building (Construction) Regulations

[CAP. 123

B 3

[Subsidiary]

Regulation

Page

55.

56.

Loads on walls

57.

58.

Recesses and openings

Corbelling and overhanging work

Thickness of walls where difference in ground levels

B 38

:

:

:

B 39

B 39

B 40

59.

Thickness of external walls of certain small buildings

B 40

60.

Cavity walls

B 40

61.

Glass block walls

B 41

62.

Parapet walls

...

B 41

**

63.

Boundary walls and fences

B 41

64.

Definition of slenderness ratio...

B 42

65.

Maximum compressive stresses in walls or piers of bricks or building blocks

B 42

66.

Maximum compressive stresses in walls and piers of concrete

B 43

67.

Eccentric loads and lateral forces on slender walls

B 45

68.

69.

70.

72.

11.

Panel walls...

Cladding

Party walls to be carried up to roof

Timber not to be built into walls

Damp-proof courses

B 45

B 46

B 46

B 46

:

B 47

PART VII

FIREPLACES, FLUES AND CHIMNEYS

73.

Fireplaces and stoves to have hearths

74.

Fireplace openings

75.

Fireplaces to have chimneys and flues

76.

77.

78.

Chimney stacks to be carried above roof

Combustible materials in proximity to chimneys

Chimney shafts...

79.

Open cooking slabs to have hoods

80.

Ceilings over fireplaces to be protected

PART VIII

ROOFS

81.

Roofs to be covered

82.

Roofs to be weatherproof

83.

Accessible roofs to have parapet or railings

84.

Hollow ceilings ..

PART IX

E

DUTIES OF REGISTERED STRUCTURAL ENGINEER IN STRUCTURAL USE OF TIMBER, STEEL AND REINFORCED CONCRETE

85.

Steel framed and reinforced concrete structures

PART X

STRUCTURAL USE OF TIMBER

86.

87.

Finished sizes of structural timber

Minimum load on ceiling joists and floor boards

+

B 47

B 47

B 48

B 48

B 49

B 49

B 51

B 51

k

:

B 51

B 52

B 52

B 52

B 52

B 53

B 53

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2026-05-04 08:08:55 · NVIDIA / meta/llama-4-maverick-17b-128e-instruct
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1985 Ed.] Building (Construction) Regulations [CAP. 123 B 3 [Subsidiary] Regulation Page 55. 56. Loads on walls 57. 58. Recesses and openings Corbelling and overhanging work Thickness of walls where difference in ground levels B 38 : : : B 39 B 39 B 40 59. Thickness of external walls of certain small buildings B 40 60. Cavity walls B 40 61. Glass block walls B 41 62. Parapet walls ... B 41 ** 63. Boundary walls and fences B 41 64. Definition of slenderness ratio... B 42 65. Maximum compressive stresses in walls or piers of bricks or building blocks B 42 66. Maximum compressive stresses in walls and piers of concrete B 43 67. Eccentric loads and lateral forces on slender walls B 45 68. 69. 70. 72. 11. Panel walls... Cladding Party walls to be carried up to roof Timber not to be built into walls Damp-proof courses B 45 B 46 B 46 B 46 : B 47 PART VII FIREPLACES, FLUES AND CHIMNEYS 73. Fireplaces and stoves to have hearths 74. Fireplace openings 75. Fireplaces to have chimneys and flues 76. 77. 78. Chimney stacks to be carried above roof Combustible materials in proximity to chimneys Chimney shafts... 79. Open cooking slabs to have hoods 80. Ceilings over fireplaces to be protected PART VIII ROOFS 81. Roofs to be covered 82. Roofs to be weatherproof 83. Accessible roofs to have parapet or railings 84. Hollow ceilings .. PART IX E DUTIES OF REGISTERED STRUCTURAL ENGINEER IN STRUCTURAL USE OF TIMBER, STEEL AND REINFORCED CONCRETE 85. Steel framed and reinforced concrete structures PART X STRUCTURAL USE OF TIMBER 86. 87. Finished sizes of structural timber Minimum load on ceiling joists and floor boards + B 47 B 47 B 48 B 48 B 49 B 49 B 51 B 51 k : B 51 B 52 B 52 B 52 B 52 B 53 B 53
Baseline (Original)
1985 Ed.] Building (Construction) Regulations [CAP. 123 B 3 [Subsidiary] Regulation Page 55. 56. Loads on walls $7. 58. Recesses and openings Corbelling and overhanging work Thickness of walls where difference in ground levels B 38 : : : B 39 B 39 B 40 59. Thickness of external walls of certain small buildings B 40 60. Cavity walls B 40 61. Glass block walls B41 62. Parapet walls ... B 41 ** 63. Boundary walls and fences B 41 64. Definition of slenderness ratio... B 42 65. Maximum compressive stresses in walls or piers of bricks or building blocks B 42 66. Maximum compressive stresses in walls and piers of concrete B 43 67. Eccentric loads and lateral forces on slender walls B 45 68. 69. 70. 72. 11. Panel walls... Cladding Party walls to be carried up to roof Timber not to be built into walls Damp-proof courses B 45 B 46 B 46 B 46 : B 47 PART VII FIREPLACES. LUES AND CHIMNEYS 73. Fireplaces and stoves to have hearths 74. Fireplace openings 75. Fireplaces to have chimneys and flues 76. 77. 78. Chimney stacks to be carried above roof Combustible materials in proximity to chimneys Chimney shafts... 79. Open cooking slabs to have hoods 80. Ceilings over fireplaces to/be protected PART VIII ROOFS 81. Roofs to be covered 82. Roofs to be weatherproof 83. Accessible roofs to have parapet or railings 84. Hollow ceilings .. PART IX E DUTIES OF REGISTERED STRUCTURAL ENGINEER IN STRUCTURAL USE OF TIMBER. STEEL AND REINFORCED CONCRETE 85. Steel framed and reinforced concrete structures PART X STRUCTURAL USE OF TIMBER 86. 87. Finished sizes of structural timber Minimum load on ceiling joists and floor boards + B 47 B 47 B 48 B 48 B 49 B 49 B 51 B 51 k : B 51 B 52 B 52 B 52 B 52 B 53 B 53
2026-05-04 08:08:55 · Baseline
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1985 Ed.]

Building (Construction) Regulations

[CAP. 123

B 3

[Subsidiary]

Regulation

Page

55.

56.

Loads on walls

$7.

58.

Recesses and openings

Corbelling and overhanging work

Thickness of walls where difference in ground levels

B 38

:

:

:

B 39

B 39

B 40

59.

Thickness of external walls of certain small buildings

B 40

60.

Cavity walls

B 40

61.

Glass block walls

B41

62.

Parapet walls

...

B 41

**

63.

Boundary walls and fences

B 41

64.

Definition of slenderness ratio...

B 42

65.

Maximum compressive stresses in walls or piers of bricks or building blocks

B 42

66.

Maximum compressive stresses in walls and piers of concrete

B 43

67.

Eccentric loads and lateral forces on slender walls

B 45

68.

69.

70.

72.

11.

Panel walls...

Cladding

Party walls to be carried up to roof

Timber not to be built into walls

Damp-proof courses

B 45

B 46

B 46

B 46

:

B 47

PART VII

FIREPLACES. LUES AND CHIMNEYS

73.

Fireplaces and stoves to have hearths

74.

Fireplace openings

75.

Fireplaces to have chimneys and flues

76.

77.

78.

Chimney stacks to be carried above roof

Combustible materials in proximity to chimneys

Chimney shafts...

79.

Open cooking slabs to have hoods

80.

Ceilings over fireplaces to/be protected

PART VIII

ROOFS

81.

Roofs to be covered

82.

Roofs to be weatherproof

83.

Accessible roofs to have parapet or railings

84.

Hollow ceilings ..

PART IX

E

DUTIES OF REGISTERED STRUCTURAL ENGINEER IN STRUCTURAL USE OF TIMBER. STEEL AND REINFORCED CONCRETE

85.

Steel framed and reinforced concrete structures

PART X

STRUCTURAL USE OF TIMBER

86.

87.

Finished sizes of structural timber

Minimum load on ceiling joists and floor boards

+

B 47

B 47

B 48

B 48

B 49

B 49

B 51

B 51

k

:

B 51

B 52

B 52

B 52

B 52

B 53

B 53

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