Starting with version 2.0, BuildCalc's Hip/Valley function has been enhanced
to display the most information with the least number of
keystrokes. One press of the [Hip/V] key and all Hip/Valley function results are displayed in a list.
The [Hip/V] key calculates the layout geometry for a Hip or Valley
Rafter based on the Regular and Irregular roof geometry, as described by two of the
following: [Pitch], [Rise], [Run] and [Diag].
If the Hip or Valley is the junction of two roofs of the same pitch (a regular hip roof) the pitch is entered using the [Pitch]
key. If the Hip or Valley is the junction of two roofs of
different pitches (an irregular hip roof) then the first (regular or
major) roof pitch is entered using the [Pitch] key and the second (irregular or minor) roof pitch is entered prior to pressing the [Hip/V] key.
Examples
1. Regular Hip/Valley Rafter Calculation
Input
[clr][clr]
12
[Feet] [Rise]
15 [Feet]
[Run]
[Hip/V]
Display
0
Rise
12ft
Run
15ft
see results, below
2. Irregular Hip/Valley Rafter Calculation assuming an Irregular Pitch of 30°.
Input
[clr][clr]
12 [Feet] Rise
15 [Feet] Run
30 [Hip/V]
Display
0
Rise
12ft
Run
15ft
see results, below
Definitions:
Plan view of Hip/Valley layout
Illustration of the types of Purlins
Illustration of Hip/Valley Rafter Backing Angles
Notes:
The Plan View Hip/Valley Layout illustrates the Cheek Cut Angles for an Irregular Pitch Roof.
For a Regular Pitch Roof, Cheek Cut Angle 1 = Cheek Cut Angle 2.
BuildCalc's
purlin calculations
are for purlins that are at right angles to rafters (battens, over
purlins, common purlins, butt purlins and under purlins). For
vertical purlins, instead use the associated plan angle for the miter
angle and 90° for the bevel angle.
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