Height Above Plate HAP Rafter Calculator

Strong Built Establishments Builders

SBE Builders is a commercial and residential framing contractor located in Discovery Bay California. Our Systematic Construction Logic produces Strong Built Establishments. E-Defense stands for Earthquake-Defense. Is your building ready for the next Earthquake?

Height Above Plate Rafter Calculator
H.A.P. v1.0

	Major Pitch

	Major Pitch Rafter Seat Cut Length

	Major Pitch Rafter Material Depth

results are show below in the IFrame window

This height above plate rafter script - calculator will return the H.A.P. for different sizes of rafters. The script also returns passed or failed for the D/4 and 1/3 rule for rafter bearing above the plate line.

hap.pl source code for perl script that generates these rafter calculations

HAP rafter table for all material sizes with single pitch
4/12 pitch
5/12 pitch
6/12 pitch
7/12 pitch
8/12 pitch
9/12 pitch
10/12 pitch
11/12 pitch
12/12 pitch

HAP rafter table for all material sizes and pitches

SBE Builders
5305 Laguna Ct.
Discovery Bay, California 94505
(925) 634-6022 • Fax: (925) 634-6022

Commercial & Residential Framing Contractor
Build it Green Framing Contractor
American Carpenter and Builder
Licensed Building Contractor
CA LIC.# 546126

Roof Framing Geometry

Roof framing geometry is empirical-type knowledge.
Information gained by means of observation, experience, or experiment.
From ground Line 0: Z1, Z2, Z3 etc...
To Roof Axis 0: A1, A2, A3 etc...
To the bring back line 0 for scribing: B1, B2, B3 etc...

Canadian & American Geometric Roof Framing Development
using a Steel Framing Square

Geometric Roof Framing Development for Irregular Hip Roof Calculations
using a Steel Framing Square

Geometric Development of Tetrahedron
using a Steel Framing Square

Hip Rafter Backing Bevel Angles from 1830 to 2009

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