Home Plans & Specifications

The blueprints or plans are scaled drawings of the structure. The most common scale for residential plans is 1/4"=1'. Plans or prints as they are often called are drawn by hand or with a CAD program. Contractors and sub-contractors must know how to read plans.
The Specifications describe things that can't be seen on the plans such as the description of materials and engineering calculations. They also specify such things as the type of equipment used and installed, and techniques & methods for construction. Here are a couple of examples of information that is contained in the specs but not in the blueprints.