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Traditional Construction ProceduresAs mentioned before, construction under the traditional construction procedure is performed by While they would like to satisfy the owner and the building designers, contractors have the main objective of making a Hence, their initial task is to prepare a bid price based on an accurate estimate of construction This requires development of a concept for performance of the work and a construction time After a contract has been awarded, contractors must furnish and pay for all materials, equipment, power, labor, and supervision required for The owner compensates the contractors for construction costs and A general contractor assumes overall responsibility for construction of a The contractor engages subcontractors who take responsibility for the work of the various trades required for For example, a plumbing contractor installs the plumbing, an electrical contractor installs the electrical system, and an elevator contractor installs Their contracts are with the general contractor, and they are paid by the general Sometimes, in addition to a general contractor, the owner contracts separately with specialty contractors, such as electrical and mechanical contractors, who perform a substantial amount of the work require for a Such contractors are called prime Their work is scheduled and coordinated by the general contractor, but they are paid directly by the Sometimes also, the owner may use the design-build method and award a contract to an organization for both the design and construction of a Such organizations are called design-build One variation of this type of contract is employed by developers of groups of one-family homes or low-rise apartment The homebuilder designs and constructs the dwellings, but the design is substantially completed before owners purchase the Administration of the construction procedure often is Consequently, some owners seek assistance from an expert, called a professional construction manager, with extensive construction experience, who receives a The construction manager negotiates with general contractors and helps select one to construct the Managers usually also supervise selection of During construction, they help control costs, expedite equipment and material deliveries, and keep the work on In some cases, instead, the owner may prefer o engage a construction program manager, to assist in administrating both design and Construction contractors employ labor that may or may not be Unionized craftspeople are members of unions that are organized by construction trades, such as carpenter, plumber, and electrician unions, Union members will perform only the work assigned to their During construction, all work should be For this purpose, the owner, often through the architect and consultants, engages The field inspectors may be placed under the control of an owner’s representative, who may be titled clerk of the works, architect’s superintendent, engineer’s superintendent, or resident The inspectors have the responsibility of ensuring that construction meets the requirements of the contract documents and is performed under safe Such inspections may be made at frequent In addition, inspections also are made by representatives of one or more governmental They have the responsibility of ensuring that construction meets legal requirements and have little or no concern with detailed conformance with the contract Such legal inspections are made periodically or at the end of certain stages of One agency that will make frequent inspections is the local or state building department, whichever has The purpose of these inspections is to ensure conformance with the local or state building Following is a description of the basic traditional construction procedure for a multistory After the award of a construction contract to a general contractor, the owner may ask the contractor to start a portion of the work before signing of the contract by giving the contractor a letter of intent or after signing of the contract by issuing a written notice to The contractor then obtains construction permits, as required, form governmental agencies, such as the local building, water, sewer, and highway The general contractor plans and schedules construction operations in detail and mobilizes equipment and personnel for the Subcontractors are notified of the contract award and issued letters of intent or awarded subcontracts, then are given, at appropriate times, notices to Before construction starts, the general contractor orders a survey to be made of adjacent structures and terrain, both for the record and to become knowledgeable of local A survey is then made to lay out Field offices for the contractor are erected on or near the If desirable for safety reasons to protect passersby, the required to be removed from the site are demolished and the debris is carted Next, the site is prepared to receive the This work may involve grading the top surface to bring it to the proper elevations, excavating to required depths for basement and foundations, and shifting of utility For deep excavations, earth sides are braced and the bottom is Major construction starts with the placement of foundations, on which the building This is followed by the erection of load-bearing walls and structural Depending on the height of the building, ladders, stairs, or elevators may be installed to enable construction personnel to travel from floor to floor eventually to the Also, hoists may be installed to lift materials to upper If needed, temporary flooring may be placed for use of As the building rises, pipes, ducts, and electric conduit and wiring are Then, permanent floors, exterior walls, and windows are At the appropriate time, permanent elevators are If required, fireproofing is placed for steel Next, fixed partitions are built and the roof and its covering are put is place,Finishing operations There include installation of the following: ceilings; tile; wallboard; wall paneling; plumbing fixtures; heating furnaces; air-conditioning equipment; heating and cooling devices for rooms; escalators; floor coverings; window glass; movable partitions; doors; finishing hardware; electrical equipment and apparatus, including lighting fixtures, switches, transformers, and controls; and other items called for in the drawings and Field offices, fences, bridges, and other temporary construction must be removed from the Utilities, such as gas, electricity, and water, are hooked up to the The sit is landscaped and Finally, the building interior is painted and The owner’s representatives then give the building a final If they find that the structure conforms with the contract documents, the owner accepts the project and gives the general contractor final payment on issuance by the building department of a certificate of occupancy, which indicates that the completed building meets building-code 传统的施工程序众所周知,在传统的施工程序中进行施工的承包商。尽管他们想满足业主和建筑设计师的要求,但是最终还是以赚取利润为主要目标的。因此,他们最初的任务是对编写投标价格的建筑成本进行准确的估计。这就需要进行前期调查的工作并且做出施工时间表。等合约批出后,施工方必须提供所有材料并支付其费用,设备,电力,劳动力。业主此时需要进行必要的监督。一个总承包商承担一个建筑整体的责任。从事分包的承建商则需承担建造工程所需的各个工作。例如,管道承包商安装水管,电业承办商安装电气系统,电梯则由电梯承包商安装。他们与总承包商签订合同,费用由总承包商支付。有时候,除了一个总承包商,还有各种专业承包商,如电气和机械承包商,执行工作时需要与业主签订合同。这种承包商被称为间接承包商。他们的工作,由总承包商协调,但它们都是由业主直接联系。还有些时候,业主可以使用设计建造方法同时兼有设计和建筑施工单位的职能。这些单位被称为设计建造承包商。这方面的一个类型的合同聘用的变化是由一户住宅或低层住宅建筑群的开发。在房屋建筑设计和建造的住房,但设计之前需要由购买房屋的业主完成。施工过程管理往往是困难的。因此,一些业主会去寻求专家的协助,这些专家被称为专业施工经理,他们具有丰富的施工经验。施工经理与总承包商进行谈判,并选择其中一个项目。施工经理通常还监督分包商。在施工期间,它们有助于控制成本,加快运送设备和材料,并保持工作的进度。在依法行政,协助设计和建设的情况下,业主可以选择从事建筑项目经理。建筑承包商雇用的劳动力,一般有大工和小工。大工再建筑工程中从事技术活,如木工,管道工,工会成员和电工工会,小工则执行了分配给他们的工作。在施工期间,一切工作都要验收。因此,业主通过建筑师和监理经常进行督查。可能是名为工程员,建筑师或驻地工程师。作为业主的代表实地视察。核查人员必须确保工程符合合同文件的要求,并在安全的条件下进行的责任。这种检查可作出重复。此外,验收还是需要一个或多个政府机构的代表。他们必须确保工程符合法律要求,并负责检查与合同文件是否一致。这种视察一般定期或在某些阶段施工结束以后进行。地方或国家建设部门具有管辖权。这些检查的目的是确保符合当地或国家的建筑规范。以下是传统多层建筑施工的基本程序。建造开始后合同授予开发商,业主可要求开发商开始施工之前签约给或之后签约发出书面通知的同时另一部分工作继续进行。紧接着施工方根据需要获取建筑许可证,例如当地的建设,供水,污水处理,政府机构和公路部门。总承包商的计划和进度详细施工作业以及动员项目设备和人员。分包商得到通知后,做出签订合同的意向或授予分包合同书,然后给出在适当的时候进行通知。在施工前启动,总承包商要进行的一项调查就是邻近结构和地形,这些都要记录在案,并要熟悉当地情况。这项调查结束以后,随即进行布局建设。承建商的现场办事处都建在施工现场或附近。为了安全起见,必须从脚手架上移除的东西,产生的碎片都要运走。下一步,该网架是为建设工程准备的。这项工作为地下室开挖和基础开挖的深度,以及公用事业管道转移找到正确的标高。深挖掘,土方支撑,底部排出。建筑开始于基础上,然后是承重墙和结构框架的施工。梯子,楼梯,或电梯的安装,可让施工人员往返于各个楼层。此外,可安装卷扬机来运送材料。由于建筑高度的上升,管道,电力管道和线路安装以及永久地板,外墙,窗户和构造的影响。在适当的时候,永久的电梯安装。再需要的情况下可以安装防火卷帘。其次,屋顶等地方也需要安装。精加工工序安装有包括以下内容:天花板,瓷砖,墙板,墙壁镶板,水管装置,加热炉,空气调节设备,加热和冷却室装置;自动扶梯;地板,窗户玻璃;活动板,门;电气设备和仪器,包括照明灯具,开关,变压器,控制器,遵照项目的图纸和规格。外地办事处,围栏,桥梁和其他临时建筑,公共设备,如天然气,电力管道,水管,都连接到建筑上。最后,是建筑物内部的打扫和清洗。业主的代表,会给建设工程作最后检查。如果他们满意并认为符合合同文件,那么业主接受该项目,并交给总承包商的一个占用证书,这表明,总承包商已完成建设,建设部门再根据建筑规范的要求发放最后付款。请采纳。
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1钢筋混凝土 素混凝土是由水泥、水、细骨料、粗骨料(碎石或;卵石)、空气,通常还有其他外加剂等经过凝固硬化而成。将可塑的混凝土拌合物注入到模板内,并将其捣实,然
1钢筋混凝土 素混凝土是由水泥、水、细骨料、粗骨料(碎石或;卵石)、空气,通常还有其他外加剂等经过凝固硬化而成。将可塑的混凝土拌合物注入到模板内,并将其捣实,然
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1钢筋混凝土 素混凝土是由水泥、水、细骨料、粗骨料(碎石或;卵石)、空气,通常还有其他外加剂等经过凝固硬化而成。将可塑的混凝土拌合物注入到模板内,并将其捣实,然
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