文档介绍：Unit 12 Construction Surveying
Part ⅠIllustrated Words and Concepts
Figure 12-1 Elevations Determined by Transit and Leveling Rod
Figure 12-2 A Plot Plan of Elevations and Location of a House
Part Ⅱ Passages
Passage A Construction Surveying
Passage B The Survey of a Plot Plan
Unit 12 Construction Surveying
Part Ⅰ Illustrated Words and Concepts
Figure 12-1 Elevations Determined by Transit and Leveling Rod
Unit 12 Construction Surveying
Part Ⅰ Illustrated Words and Concepts
Figure 12-2 A Plot Plan of Elevations and Location of a House
Unit 12 Construction Surveying
Part Ⅱ Passages Passage A
Construction Surveying
The construction industry is the largest in the United States and surveying is an essential part of that industry. A boundary survey and the preparation of the necessary topographic maps is the first step in the construction process. From these maps the positions of the structures are established and when the final plans for the project are available,
Unit 12 Construction Surveying
Part Ⅱ Passages Passage A
it is the duty of the surveyor to set the required horizontal and vertical positions for the structures. In other words, construction surveying involves the transfer of the dimensions on the drawing to the ground so that the work is done in its correct position. This type of surveying is sometimes called “setting lines and grades”. The work of the surveyor for construction projects is often referred to as layout work and the term “layout engineer” may be used in place of the term “surveyor”.
Unit 12 Construction Surveying
Part Ⅱ Passages Passage A
Of necessity, construction surveying begins before actual construction and continues until the project pleted. Surveying is an essential part of the construction process and must be carried out in coordination with other operations in order to have an economical job and to prevent serious mistakes.
Unit 12 Construction Surveying
Part Ⅱ Passages Passage A
The reader can readily understan