# RE: Metric Roof Slope

• To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
• Subject: RE: Metric Roof Slope
• From: Alfonso S Quilala <aquilala(--nospam--at)taylorgaines.com>
• Date: Thu, 20 Jul 2000 19:07:29 -0700
```Most engineers, I guess, knew that the slope is unitless.  But the reason
why it is expressed as 2:12 rather than 1:6 is because it is easier to
figure out the slope when thinking of 12" = 1 ft.  So, if you have 24 ft.
then you know right away that the rise is 48".

In metric, if the slope says 16.67% and you have 7.32 meters then just
muliply 16.67x7.32 and you get 122 cm.

Engr. Alfonso S. Quilala Jr., P.E.

-----Original Message-----
From: Roger Turk [mailto:73527.1356(--nospam--at)compuserve.com]
Sent: Thursday, July 20, 2000 5:26 PM
To: seaint(--nospam--at)seaint.org
Subject: RE: Metric Roof Slope

Roof slope, expressed as, 2:12, is unitless since it is the same if both
numerator and denominator were in inches, feet, mm, metres, rods, furlongs,
miles, kilometres, etc.  I would hope that you are not referring to a slope
of 2-inches in 12-feet.

A. Roger Turk, P.E.(Structural)
Tucson, Arizona

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