No.313

Announcement of Publishing the National Standard Code for Construction of Masonry Structures Engineering

Code for Construction of Masonry Structures Engineeringhas been approved as a national standard with aserial number of GB 50924-2014,and shall be implemented on October 1,2014.Thereinto,Articles4.2.2,6.2.4and8.3.5are compulsory provisions and must be enforced strictly.

Authorized by the Research Institute of Standard and Norms of Ministry of Housing and Uban-Rural Development of the Peoples Republic of China,this code is published and distributed by China Architecture&Building Press.

Ministry of Housing and Urban-Rural Development of the Peoples Republic of China

January 29,2014

Announcement of the Ministry of Housing and Urban-Rural Development of the Peoples Republic of China

No.313

Announcement of Publishing the National Standard Code for Construction of Masonry Structures Engineering

Code for Construction of Masonry Structures Engineering has been approved as a national standard with aserial number of GB 50924-2014,and shall be implemented on October 1,2014.Thereinto,Articles 4.2.2, 6.2.4 and 8.3.5 are compulsory provisions and must be enforced strictly.

Authorized by the Research Institute of Standard and Norms of Ministry of Housing and Uban-Rural Development of the Peoples Republic of China,this code is published and distributed by China Architecture&Building Press.

Ministry of Housing and Urban-Rural Development of the Peoples Republic of China

January 29,2014

目录

NOTICE

Announcement of the Ministry of Housing and Urban-Rural Development of the Peoples Republic of China

Foreword

1 General Provisions

2 Terms

3 Basic Requirements

3.1 Construction Preparation

3.2 Control Measures

3.3 Technical Requirements

4 Raw Materials

4.1 General Requirements

4.2 Cement

4.3 Sand

4.4 Block

4.5 Steel Bar

4.6 Lime,Lime Putty and Fly Ash

4.7 Other Materials

5 Masonry Mortar

5.1 General Requirements

5.2 Ready-mixed Mortar

5.3 On-site Mixing Mortar

5.4 Mixing Mortar

5.5 Mortar-cube Making and Curing

6 Brick Masonry Engineering

6.1 General Requirements

6.2 Masonry

6.3 Quality Inspection

7 Concrete Small-sized Hollow Block Masonry Engineering

7.1 General Requirements

7.2 Masonry

7.3 Concrete Core Column

7.4 Quality Inspection

8 Stone Masonry Engineering

8.1 General Requirements

8.2 Masonry

8.3 Earth-retaining Wall

8.4 Quality Inspection

9 Reinforced Masonry Engineering

9.1 General Requirements

9.2 Reinforced Brick Masonry Construction

9.3 Reinforced Block Masonry Construction

9.4 Quality Inspection

10 Filler Wall Masonry Engineering

10.1 General Requirements

10.2 Masonry

11 Winter and Rain Construction

11.1 Winter Construction

11.2 Rain Construction

12 Safety and Environmental Protection

12.1 Safety

12.2 Environmental Protection

Appendix A Grade Evaluation and Check of Masonry Engineering Construction Quality Control

Appendix B Construction Method for Bonded Rebar of Steel Tie

Appendix C Quality Inspection for Bonded Rebar of Steel Tie

Explanation of Wording in This Code

List of Quoted Standards

4.2.2 If the quality of cement is affected by adverse environment during application or the cementhas been delivered for more than 3 months(more than 1 month for rapid hardening Portland cement),it shall be subject to re-inspection and then applied according to the re-inspection result.

6.2.4 The corner and junction of brick masonry shall be constructed simultaneously.As for the area with seismic fortification intensity of 8 or above, the masonry of temporary disconnected point which cannot be constructed simultaneously shall be of stepped racking; thereinto, the horizontal projection length of stepped racking for common brick masonry shall not be less than 2/3 of height(h) (Figure 6.2.4);the length-height ratio of stepped racking for perforated brick masonry shall not be less than 1/2.The height ofstepped racking shall not exceed the height of single-step scaffold.

8.3.5 Discharge hole must be retained for earth-retaining wall according to the design requirements;where there is no specific design requirement, its construction shall meet the following requirements:

1 Discharge holes shall be arranged uniformly in vertical and horizontal directions of earth-retaining wall, and the horizontal spacing of discharge holes arranged in each meter of earth-retaining wall shall not be greater than 2m;

2 The discharge hole diameter shall not be less than 50mm;

3 Pebble or gravel drainage layer with length and width not less than 300mm and thickness not less than 200mm shall be arranged between discharge hole and soil.