GB 50500-2013 Code of Bills of Quantities and Valuation for Construction Works

General Provisions

• 第 1.0.1 条To standardize the pricing practices for bills of quantities in construction projects and to unify the method…
• 第 1.0.3 条Hotel construction projects wholly funded by state owned funds or predominantly funded by state owned funds (…
• 第 1.0.4 条For hotel construction projects not funded by non state capital, bill of quantities pricing should be adopted…
• 第 1.0.5 条Pricing activities for the bill of quantities in hotel construction projects shall follow the principles of o…
• 第 1.0.6 条Pricing activities for hotel construction projects shall, in addition to complying with this code, also compl…
• 第 1.0.3 条Note : Chapter 1 "General Provisions" mainly specifies the scope of application of the code, mandatory requir…

Terminology

• 第 2.0.1 条Bill of Quantities: an itemized list stating the names and corresponding quantities of divisional and sub div…
• 第 2.0.3 条Comprehensive unit price: the labor cost, material cost, construction machinery and tool use cost, enterprise…
• 第 2.0.8 条Provisional sum: A sum temporarily set by the tenderer in the bill of quantities and included in the contract…
• 第 2.0.9 条Provisional sum: the unit price of materials that will inevitably occur but whose prices cannot be determined…
• 第 2.0.10 条Daywork: During construction, miscellaneous items or work outside the construction drawings proposed by the e…
• 第 2.0.11 条General Contracting Service Fee: The fee required for the general contractor to cooperate with and coordinate…
• 第 2.0.12 条Statutory fees: Fees that must be paid in accordance with regulations of the provincial government or relevan…
• 第 2.0.13 条Taxes: VAT, urban maintenance and construction tax, education surcharges, and local education surcharges that…
• 第 2.0.16 条Engineering Change: During the implementation of the contract works, any increase, decrease, cancellation, or…
• 第 2.0.21 条Claim: During the performance of a construction contract, a loss suffered by one party due to reasons not att…
• 第 2.0.22 条Site visa: a signed certification made by the employer's site representative and the contractor's site repres…
• 第 2.0.24 条Tender control price: The maximum price limit for the tendered works, prepared by the tenderer in accordance …

Preparation of bill of quantities

• 第 4.1.2 条The bill of quantities for tendering must form part of the tender documents, and its accuracy and completenes…
• 第 4.1.5 条The safety and civilized construction fee in the list of measure items must be priced in accordance with the …
• 第 4.2.2 条The bill of quantities for divisional and sub divisional works shall be prepared in accordance with the item …
• 第 4.2.3 条Project characteristics shall be described in accordance with those specified in the appendix, combined with …
• 第 4.2.4 条Quantities shall be calculated in accordance with the quantity calculation rules specified in the appendix. T…
• 第 4.3.1 条The other items list shall include the following: provisional sum, provisional price, daywork, and general co…
• 第 4.3.3 条The provisional prices for materials and engineering equipment in the provisional sum shall be estimated base…
• 第 4.3.4 条Daywork items shall list the item name, unit of measurement and provisional quantity. Common daywork items in…
• 第 4.3.5 条The general contracting service fee shall list the service items and their contents, etc. In hotel projects, …
• 第 4.4.1 条The list of statutory fees shall be itemized as required, including: social insurance premiums, housing provi…
• 第 4.4.2 条The tax item list shall include: VAT, urban maintenance and construction tax, education surcharge, and local …
• 第 4.5.1 条The preparer of the bill of quantities must be a cost engineering professional with the appropriate qualifica…

Preparation of the bill of quantities

• 第 4.2.1 条The BOQ for work sections and items shall include the item code, item name, item characteristics, unit of mea…
• 第 4.3.2 条The provisional sum shall be estimated in accordance with the relevant pricing regulations based on the chara…

Tender control price

• 第 5.1.1 条Hotel construction projects invested with state owned funds shall prepare a tender control price. The tender …
• 第 5.1.2 条The tender control price shall be published at the time of tendering and shall not be raised or lowered. The …
• 第 5.2.1 条The BOQ for divisional and sub divisional works shall be priced using comprehensive unit rates. The comprehen…
• 第 5.2.2 条The unit prices of materials and engineering equipment shall be determined based on the engineering cost info…
• 第 5.2.3 条The safety and civilized construction fee within the measure project costs (hotel projects typically include …
• 第 5.2.4 条In other project costs:<br • Provisional sum : generally calculated at 10%–15% of the divisional and sub divi…
• 第 5.2.5 条Statutory fees (such as social insurance premiums and housing provident fund) and taxes (VAT rate 9%) shall b…
• 第 5.2.6 条The tender control price shall be prepared based on the following references:<br • Pricing quotas issued by n…
• 第 5.3.1 条The error rate of the tender control price should be controlled within ±3% (i.e., if the deviation between th…
• 第 5.3.2 条The tender control price shall be prepared by the tenderee with the capability to prepare it, or by an engine…

Bid price

• 第 6.1.1 条Basis for bid pricing : Bidders shall quote independently based on the tender bill of quantities, tender docu…
• 第 6.1.3 条No bidding below cost : The bid price shall not be lower than the project cost. For hotel projects, particula…
• 第 6.1.4 条Composition of comprehensive unit price : The comprehensive unit price shall include labor costs, material co…
• 第 6.2.1 条Priced Bill of Quantities for Divisional and Sub divisional Works : The bidder shall enter the comprehensive …
• 第 6.2.2 条Pricing of preliminaries/measured items : The pricing of preliminaries shall be independently quoted based on…
• 第 6.2.3 条Pricing of Other Project Costs :<br • Provisional Sum : Enter the amount listed in the tender bill of quantit…
• 第 6.2.4 条Statutory fees and taxes :<br • Statutory fees : Including social insurance premiums (pension insurance, medi…
• 第 6.2.5 条Risk cost : Bidders should allow for a certain proportion of risk cost in the comprehensive unit rate, taking…
• 第 6.2.6 条Total Bid Price : The total bid price shall be consistent with the combined sum of the divisional and sub div…
• 第 6.3.2 条Pricing strategy : Bidders are permitted to use unbalanced bidding, provided it is reasonable. For example:<b…

Tender quotation

• 第 6.3.1 条Review of bill of quantities : Bidders shall review the tender bill of quantities. If significant quantity de…

Contract Price Agreement

• 第 7.1.1 条Selection of contract type : Projects using the bill of quantities (BOQ) for pricing shall adopt a unit price…
• 第 7.1.3 条Risk allocation principle : For projects priced using a bill of quantities, wording such as unlimited risk, a…
• 第 7.1.4 条Missing items in the bill of quantities : Where project quantities increase or decrease due to engineering ch…
• 第 7.2.1 条Contract price terms : Should stipulate the advance payment, progress payment, completion settlement payment,…
• 第 7.2.2 条Price adjustment method : Agree on the range of price variation for major materials and engineering equipment…
• 第 7.2.3 条Adjustment of measure item costs : If measure items change due to omissions in the BOQ of divisional and sub …
• 第 7.3.1 条Schedule delay and contract price : If the schedule is delayed due to the employer's reasons, the price of th…
• 第 7.4.1 条Changes in laws and regulations : Where changes in national laws, regulations, rules and policies affect the …
• 第 7.5.1 条Engineering Change : If an engineering change causes changes to the priced bill of quantities items or their …
• 第 7.6.1 条Claim Procedure : The Contractor shall, within 28 days after becoming aware of or when it should have become …
• 第 7.7.1 条Site instruction (field instruction) : Where the Contractor is required by the Employer to carry out minor wo…

Engineering quantity measurement

• 第 4.1.2 条Units of measurement and significant digits : The units of measurement in the bill of quantities must comply …
• 第 4.2.1 条Calculation rules for divisional and sub divisional quantities : In hotel buildings, cast in place concrete m…
• 第 1.1 条Appendix A. Earthwork (hotel foundation pit/pipe trench) : Foundation earthwork excavation shall be calculate…
• 第 1.1 条Appendix B. Guest room/corridor floor finishes : Block finishes (e.g., marble, ceramic tile) are measured by …
• 第 2.1 条Appendix B. Wall finishes (lobby/guest rooms) : Wall plastering is measured by area according to the dimensio…
• 第 3.1 条Appendix B. Suspended ceiling (banquet hall/guest room) : measured by the horizontal projected area as shown …
• 第 1.1 条Appendix C. Electrical engineering (guest rooms/public areas) : Conduit is measured by length per the dimensi…
• 第 1.1 条Appendix D. Ventilation and Air Conditioning Works (Guest Rooms/Restaurants) : Ductwork shall be measured by …
• 第 1.1 条Appendix E. Fire protection engineering (hotel sprinkler/alarm) : Water sprinkler piping shall be measured by…

Engineering measurement

• 第 2.1 条Appendix C. Water Supply and Drainage Engineering (Bathrooms/Kitchens) : Pipes are measured by the length of …

Contract price adjustment

• 第 9.2.1 条Quantity deviation adjustment : When the quantity deviation exceeds 15%, the comprehensive unit price for the…
• 第 9.3.1 条Price fluctuation adjustment (price index method) : When contract price is affected by fluctuations in the pr…
• 第 9.3.2 条Price fluctuation adjustment (cost information method) : Where the material unit price in the contractor's te…
• 第 9.4.2 条Engineering change adjustment (no identical item) : Where the priced bill of quantities contains no applicabl…
• 第 9.5.1 条Adjustment for inconsistent item descriptions : Where the item description in the bill of quantities provided…
• 第 9.6.2 条Adjustment for missing items in the bill of quantities : Where missing items in the divisional and sub divisi…
• 第 9.7.1 条Daywork adjustment : For miscellaneous work notified by the Employer to be carried out by the Contractor on a…
• 第 9.8.1 条Liquidated damages adjustment : If the contractor fails to complete the works within the contract period, it …
• 第 9.9.1 条Claim Adjustment : When either party files a claim against the other, it shall have legitimate grounds and va…
• 第 9.10.1 条Site visa adjustment : Where the contractor is required by the employer to complete sporadic work outside the…
• 第 9.11.1 条Adjustment of Provisional Sum : The provisional sum is used for the procurement of materials, equipment, and …
• 第 9.12.1 条Provisional sum adjustment (materials, engineering equipment) : For provisional sum items that must be tender…
• 第 9.13.1 条Force Majeure Adjustment : For costs arising from force majeure events, the employer and the contractor shall…
• 第 9.14.1 条Early Completion (Acceleration Compensation) Adjustment : If the Employer requires the Contract Works to be c…

Completion settlement

• 第 11.1.1 条Basis for preparing the completion settlement : Must include the contract, tender and bid documents, as built…
• 第 11.2.2 条Settlement of Divisional and Sub divisional Works Costs : Calculated per the contract agreement and the actua…
• 第 11.2.4 条Settlement of measure item costs : Lump sum measure items shall be settled in full per the contract; unit pri…
• 第 11.3.1 条Settlement of Other Project Costs : Includes provisional sums, provisional prices, daywork, and general contr…
• 第 11.3.2 条Provisional Sum Settlement : For provisional sums of specialized works that must be tendered by law (e.g., ho…
• 第 11.3.4 条General Contractor Service Fee Settlement : Calculated as the contractually agreed rate multiplied by the act…
• 第 11.4.1 条Claim and site instruction settlement : Claim costs shall be calculated per the contract or actual losses; si…
• 第 11.5.1 条Summary of Completion Settlement Price : The calculation formula is: Total Completion Settlement Price = Divi…
• 第 11.5.2 条Settlement verification time limit : The employer shall verify within 28 days after receiving the completion …
• 第 11.6.1 条Payment of Completion Settlement Amount : The Employer shall pay the settlement amount within 28 days after r…
• 第 11.6.3 条Quality Retention Money : The retention ratio shall not exceed 3% of the total settled project price (in acco…

Engineering reference only — verify against project conditions and the latest codes.