TYPES OF CONSTRUCTION DRAWINGS

Drawings are generally categorized according to their intended purposes. Some of the types commonly used in military construction are discussed in this section.

Master Plan Drawings

MASTER PLAN DRAWINGS are commonly used in the architectural, topographical, and construction fields. The y show sufficient features to be used as guides in long-range area development. They usually contain section boundary lines, horizontal and vertical control data, acreage, locations and descriptions of existing and proposed structures, existing and proposed surfaced and unsurfaced roads and sidewalks, streams, right-of-way, existing utilities, north point indicator (arrow), contour lines, and profiles. Master plan and general development drawings on existing and proposed Navy installations are maintained and constantly upgraded by the resident officer in charge of construction (ROICC) and by the Public Works Department (PWD).

Shop Drawings

SHOP DRAWINGS are drawings, schedules, diagrams, and other related data to illustrate a material, a product, or a system for some portion of the work prepared by the construction contractor, subcontractor, manufacturer, distributor, or supplier. Product data include brochures, illustrations, performance charts, and other information by which the work will be judged. As an SW, you will be required to draft shop drawings for minor shop and field projects. You can draw shop items, such as doors, cabinets, and small portable structures (prefabricated berthing quarters, and modifications of existing buildings), or perhaps you will be drawing from portions of design drawings, specifications, or from freehand sketches given by the design engineer.

Working Drawings

A WORKING DRAWING (also called project drawing) is any drawing that furnishes the information required by a Steelworker to manufacture a part or a crew to erect a structure. It is prepared from a freehand sketch or a design drawing. Complete information is presented in a set of working drawings, complete enough that the user will require no further information. Project drawings include all the drawings necessary for the different Seabee ratings to complete the project. These are the drawings that show the size, quantity, location, and relationship of the building components.

A complete set of project drawings consists of general drawings, detail drawings, and assembly drawings. General drawings consist of "plans" (views from above) and "elevations" (side or front views) drawn on a relatively small defined scale, such as 1/8 inch = 1 foot. Most of the general drawings are drawn in orthographic projections, although sometimes details can be shown in isometric projections. Detail drawings show a particular item on a larger scale than that of the general drawing in which the item appears, or it can show an item too small to appear at all on a general drawing. Assembly drawings are either an exterior or a sectional view of an object showing the details in the proper relationship to one another. Usually, assembly drawings are drawn to a smaller scale than are detail drawings. This procedure provides a check on the accuracy of the design and detail drawings and often discloses errors.

Red-lined Drawings

RED-LINED DRAWINGS are the official contract drawings that you will mark up during construction to show as-built conditions. Red-lined drawings are marked in color "red" to indicate either a minor design change or a field adjustment.

As-built Drawings

AS-BUILT DRAWINGS are the original contract drawings (or sepia copies) that you will change to show the as-built conditions from the red-lined drawings. Upon the completion of the facilities, the construction contractor or the Naval Military Construction Force (NMCB) is required to provide the ROICC with as-built drawings, indicating construction deviations from the contract drawings. All of the as-built marked-up prints must reflect exact as-built conditions and must show all features of the project as constructed. After the completion of the project, as-built marked-up prints are transmitted by the ROICC to the engineering field division (EFD).

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