Visa site and pay attention to point the way: the way the scene visas including engineering technology, engineering economics, engineering and project duration, such as several hidden, no matter what kind it will happen eventually, directly or indirectly, on-site visa price, affect the entire project cost, now described as follows
(1) engineering and technical visas owners and contractors it is part of the technical requirements for a construction or concrete construction methods to determine a way to contact, and lift rental including technical contact list, is a concrete and effective supplement construction organization design, sometimes because of the price involved in large amounts, it can not be ignored. For some major construction organization design, temporary modification of technical measures, should be consulted designers, if necessary organizational argument, make it safe and economical as possible apply.
(2) It refers to visa engineering economy during construction due to the venue change, the owners requirements, environmental changes, which may cause the actual project cost and the difference between the contract price to produce various types of visas, including the project owner defaults, caused by changes in non-contractor and engineering environment changes, contract defects. Because it covers a wide range of complex projects, to effectively grasp the relevant quota, documents, in particular, to strictly control the scope and content of the visa.