01_32_23_SurveyAndLayoutData.pdf

KITCHEN CREEK HELIBASE

SURVEY AND LAYOUT DATA Section 01 32 23-1

SECTION 01 32 23 – SURVEY AND LAYOUT DATA

PART 1 - GENERAL

1.1 SCOPE

A. This specification covers construction staking for elevation control, grade control, and site layout AS

SHOWN ON THE DRAWINGS.

1.2 REQUIREMENTS

A. Construction staking shall be accomplished under the direction of a State of California licensed Land Surveyor who is closely associated and familiar with construction staking.

B. Final staking for distance and location shall be the responsibility of the Contractor.

1.3 MEASUREMENT AND PAYMENT

A. Payment will be made at the contract unit price designated in the Schedule of Items and will constitute full compensation for all materials, labor, equipment, testing and incidentals necessary to complete the work as specified herein and AS SHOWN ON THE DRAWINGS.

PART 2 - PRODUCTS

2.1 All stakes shall have sufficient length to provide a solid set in the ground and to provide space for marking above ground when applicable. Control points used for elevation reference shall be 1 inch by 1 inch hubs and shall be of sufficient length to provide a solid set. Subgrade finishing stakes shall be 1/2 inch by 1/2 inch hubs and shall be of sufficient length to provide a solid set. All stakes shall be legibly marked with stake pencil that leaves an imprint or with waterproof ink.

2.2 Paper for survey notes shall be moisture resistant paper. Notes shall be contained in books with covers that will protect the contents and retain the pages in numerical sequence during field use.

2.3 Contractor shall furnish one set of staking notes (electronically), a point data file in Ascii format (electronically) and one set of as-built drawings (electronically in AutoCAD version 2004 or 2007).

PART 3 - EXECUTION

3.1 Furnish all labor, equipment, instruments, materials, transportation, and other incidentals necessary to complete the construction staking in accordance with these specifications and acceptable engineering practices.

3.2 Precision and accuracy requirements are as follows:

A. Staking for grade control shall be sufficient to provide and produce the grades, shapes and contours AS SHOWN ON THE DRAWINGS.

KITCHEN CREEK HELIBASE

SURVEY AND LAYOUT DATA Section 01 32 23-2

B. Layout of walks shall be within horizontal accuracy of 0.15 foot and within 0.01 foot vertical accuracy.

C. Trenches horizontal centerline shall be staked a minimum of every 50 feet, at all intersections or junctions, and appurtenances as shown on the drawings. Finished grade for all water and sewer lines shall be within 0.01 foot vertical accuracy.

D. Cross sections and slope stake precision:

1. Allowable deviation of cross section line projection from a true perpendicular to tangents, a bisector of angle points or a true radius of curves shall be 2 degrees plus or minus.

2. Cross section topography measurements shall be taken so that variation in ground from straight line connecting the cross section points will not exceed 0.25 foot.

3. Horizontal and vertical accuracy for cross sections shall be taken as 0.1 foot of horizontal distance measured.

4. Horizontal and vertical accuracy for slope stake, slope stake reference shall be 0.1foot and for clearing limits shall be 1foot.

3.3 Construction staking in the field requires approval from the Contracting Officer prior to commencement of work. Approval of the construction staking will not relieve the contractor of the responsibility for maintaining the survey work and for correcting errors, whether the errors are discovered during the actual survey work or in subsequent phases of the project.

3.4 Generally, surveyed plans do not include trees with less than six inch diameter.

END OF SECTION 01 32 23