MAJOR CATEGORIES OF PROJECT DRAWINGS

Generally, working or project drawings can be divided into the following major categories: civil, architectural, structural, mechanical, electrical, and fire protection. In Seabee construction, however, the major categories most commonly used are as follows: CIVIL, ARCHITECTURAL, STRUCNTURAL, MECHANICAL, and ELECTRICAL sets of drawings.

Regardless of the category, working drawings serve the following functions:

They provide a basis for making material, labor, and equipment estimates before construction begins.

They give instructions for construction, showing the sizes and locations of the various parts.

They provide a means of coordination between the different ratings.

They complement the specifications; one source of information is incomplete without the others.

Civil working drawings encompass a variety of plans and information to include the following:

Site preparation and site development

Fencing

Rigid and flexible pavements for roads and walkways

Environmental pollution control

Water supply units (that is, pumps and wells)

Depending on the size of the construction project, the number of sheets in a set of civil drawings can vary from a bare minimum to several sheets of related drawings. Generally, on an average-size project, the first sheet has a location map, soil boring log, legends, and it sometimes has site plans and small civil detail drawings. (Soil boring tests are conducted to determine the water table of the construction site and classify the existing soil.) Civil drawings are often identified with the designating letter C on their title blocks.

SITE PLANS

A SITE PLAN furnishes the essential data for laying out the proposed building lines. It is drawn from notes and sketches based upon a survey. It shows the contours, boundaries, roads, utilities, trees, structures, references, and other significant physical features on or near the construction site. The field crews (Equipment Operators) are able to estimate and prepare the site for conduction and to finish the site (including landscaping) upon completion of construction by showing both existing and finished contours. As an SW, you should be familiar with the methods and the symbols used on maps and topographic drawings.

Site plans are drawn to scale. In most instances, the engineer's scale is used, rather than the architect's scale. For buildings on small lots, the scales normally used are 1 inch = 10 feet.

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