What is Working Drawing? Working Drawings for Micropile Foundation
Objective:
Working drawings should be made considering people who will use drawing and purpose of them. The objectives of these drawings are:
• For making a plan for construction (contractor’s perspective)
• To deliver instructions for construction site,
• To procure components,
• To prepare shop drawings,
• To appoint subcontractors.
We will learn here about working drawing of a micropile but while defining working drawing architectural purposes could also include say
• Civil drawing
• Architectural drawing
• Structural drawing
• Mechanical drawing
• Electrical drawing
• Plumbing drawings
Dimensions are provided in such way that any person can manufacture designed product with the help of these drawings. Working drawings should have adequate precision and a scale should be maintained say if a drawing is one third of actual size, the scale should be 1:3 and so on.
Now consider working drawings for micropile installation. The working drawing should include following details:
1. Micropile number, pattern and location
2. Design load of micropile
3. Size and type of reinforcing bars
4. Minimum bond length (total value)
5. Maximum grouting pressures and its volume
6. Details of top attachment of micropile
7. Elevation of cut-off level of micropile
Apart from working drawing, contractors also have to submit shop drawings of structure steel to owner for approval and review which should include:
a. Components of micropile
b. Corrosion protection measures or system
c. Bond length details
d. Attachment at pile top