GB 50500-2013 第2.0.9条
| | Provisional sum: the unit price of materials that will inevitably occur but whose prices cannot be determined temporarily, as provided by the tenderer in the bill of quantities, as well as the amount for specialised works. In hotel buildings, imported sanitary ware, custom furniture, intelligent systems, etc. are often set as provisional sums; the provisional sum for materials generally does not exceed ±5% of the market price. |