Chương II Thông tư 17/2019/TT-BXD: Quy định đo bóc khối lượng

Chapter II

QUANTITY TAKEOFF REGULATIONS

Article 6. Measurement and takeoff of quantities in proportion to the designed size, output or service capacity of construction works

1. Taking off the quantity in ratio to the size, output or service capacity of a construction work shall serve the purpose of making the preliminary calculation or estimate of total investment or total construction investment according to the construction investment rate-based calculation method.

2. Taking off quantities in proportion to the building floor area of a civil or industrial construction work

a) The quantity in ratio to the floor area is the total building area of ​​all floors of a construction work, including basement, semi-basement, technical floor, attic and garret (if any). The building area of ​​a floor includes the surrounding walls (or the internal portions of shared walls) and the ground area of ​​loggias, balconies, stairs, lift wells, technical utility boxes, chimneys.

b) Descriptive information, including the height of the building (height of each floor or height of the whole building), the number of floors (including superficial floors and basements), structural properties, main materials used, special foundation reinforcement and other information related to costing activities (if any), should be recorded in the detailed or breakdown bill of quantities.

3. Quantity takeoff in ratio to the area of traffic bridges

a) Quantity in ratio to the area of a road bridge shall be taken off in proportion to the width of the bridge between the outermost of handrails and the length of the bridge stretching to the abutment end dam.

b) Descriptive information, including type of bridge, type of bridge girder, bridge width, span length, type of pile, length of foundation pile and other information related to cost calculation (if any), should be included in the detailed or breakdown bill of quantities.

4. Measurement and takeoff of quantities in proportion to the output or service capacity of a construction work

a) For works already included in the investment portfolio promulgated by competent authorities, the units of measurement used for quantity takeoff must comply with the corresponding units used in the investment book of record already in circulation.

b) When taking off the quantity in ratio to the designed output, technical specifications or service capacity of a construction work, descriptive information should clarify the properties, characteristics and types of materials used as specified in the basic design and other necessary requirements.

Article 7. Quantity takeoff in ratio to work groups, structural units or parts of construction works

1. The list of working groups, structural units or parts of a construction work shall be selected on the basis of objectives of performing main tasks in the construction process.

2. Unit of measurement

a) The unit of measurement shall be determined in accordance with the main type of construction tasks, structural units or parts of the construction work for the sake of convenience of measurement or calculation on drawings or on site surveying when developing and carrying out construction works, and shall conform to units of measurement according to announced norms (if any).

b) For work groups, structural units or parts already in the list of norms and unit prices promulgated by competent authorities, their names and units of measurement recorded in the detailed or breakdown bill of quantities, or the general or summary bill of quantities, of a construction work or work item must be in conformity with the names and units of measurement included in the book of record of norms and unit prices already in circulation.

3. The quantity taken off or measured according to the work group, structural unit or parts of a construction work shall be carried out according to the methods of measurement, counting, calculation or inspection on the basis of the size, amount and statistics in design documentation, technical instructions and requirements of works to be performed in a construction work.

Article 8. Quantity takeoff in ratio to construction activities

1. The quantity must be measured, counted and calculated in the order appropriate to the technological process and work construction order. Detailed instructions on how to take off the quantity of major construction tasks shall be provided in Appendix 1 hereto.

2. For works specified in the list of norms or construction unit prices published by competent authorities, their names and units of measurement for these works recorded in the detailed or breakdown bill of quantities, or the general or summary bill of quantities, of a construction work or work item must be conformable to the respective names and units of measurement included in the system of norms and unit prices.

Article 9. Quantity measurement and estimation in acceptance testing, commissioning, payment and settlement of construction contracts

1. When preparing the bidding documents, the project owner must clearly specify the quantity takeoff principles and methods for acceptance testing, commissioning, payment and settlement of contracts.

2. Unless otherwise agreed in the contract, the principles of quantity takeoff of major construction activities shall be subject to Appendix 1 and other relevant regulations.

3. The quantity of completed construction work must be inspected, calculated, measured and verified by the project owner, construction contractor and supervision consultant according to the time or stage of construction as specified in the terms and conditions of the construction contract, and must be compared with the quantities specified in the approved design as a basis for acceptance testing, commissioning and payment activities. As for lump-sum contracts, the detailed or breakdown takeoff of completed quantities may be optional. The quantity arising outside of the approved design and cost estimate must be accepted and approved by the project owner as a basis for acceptance testing, commissioning, payment and settlement of contracts.