Building Drawings and Specifications
Construction blueprint (working drawing) and related written specification contain all the information and dimensions needed to build or remodel a structure.
The interpretation of blueprint is critically important in the construction of floor systems, walls, and roof systems.
This unit briefly reviews the drawings that apply to building a floor system.
A) Architectural Drawings
Architectural drawings contain most of the detailed information needed by carpenters to build a floor system.
The specific categories of architectural drawings commonly used include the following. Click on each to find out more:
• Foundation plan
• Floor plan
• Section and detail plan
• Structural drawing
• Plumbing, Mechanical, and Electrical Plans
1) Foundation Plan
The foundation plan is a view of the entire sub structure below the first floor or frame of the building.
2) Floor plan
The floor plan is the mian drawing, which typically shows information on the outside walls.
The floor plan is the main drawing, which typically shows information on the outside walls.
3) Section and Detail
A section view shows how a particular feature looks inside, whereas a detail plan shows the enlargements of special features of a building or an equipment installed in a building.
4) Structural Drawing
Created by a structural engineer, these drawings accompany the architect’s plan. They are usually drawn for large structure such as an office building or factory.
5) Plumbing, Mechanical, and Electrical Plans
Plumbing plans: show the size and location of water and gas systems if they are not include in the mechanical section.
Mechanical plans: show temperature control and ventilation equipment including ducts, louvers, and registers.
Electrical plans: show all electrical equipment, lighting, out-lets, etc.
The following general procedure is suggested as a method of reading any set of blueprint for understanding:
Read the title block.
Find the north arrow.
Always be aware that blueprints work together as a group.
Check the list of blueprints in the sets.
Study the site plan (plot plan) to observe the location of the building.
Check the foundation and floor plans for the orientation of the building.
Study the features that extend for more than one floor, such as plumbing and vent, stairways, elevator shafts, heating and cooling ductwork, and piping.
Check the floor and wall construction.
Check the foundation plan for sizes and types of footing, reinforcing steel, and load bearing subtraction.
Study the mechanical plans for details on heating, cooling, and plumbing.
Observe the electrical entrance and distribution panels, and the installation of the lighting and power supplies for special equipment.
Recognize applicable symbols and their relative location in the plans.