Blueprint Pages Letters

Reference data and engineering information about blueprint pages letters for drawing tools applications.

blueprintpagesletters

Overview

Engineering reference data for Blueprint Pages Letters in drawing tools.

Key Formulas

Scale Factor

$SF = \frac{\text{drawing size}}{\text{actual size}}$

Ratio of drawing to real dimensions.

Tolerance

$T = \text{max} - \text{min}$

Allowable variation in dimensions.

Aspect Ratio

$AR = \frac{w}{h}$

Width to height ratio.

Variables

Symbol	Description	Unit
$SF$	Scale factor	—
$T$	Tolerance	mm
$AR$	Aspect ratio	—

Blueprint Letter Classifications

Blueprints are differentiated by specific letters that indicate the type of plan. These classifications help architects, engineers, and contractors quickly identify the discipline associated with each sheet of a construction document set.

5 rows

Common Blueprint Letter Designations for Disciplines
letter
A
E
M
P
S

Source: extracted from original page

Source: engineeringtoolbox.com