Hip Roof Rafter Design

The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

Hip roof rafter design.

Hip rafter diagram with full dimensions. A jack rafteris a shortened com mon rafter that may be framed to a hip rafter a valley rafter or both. The design of hip roofs can follow triangular sides as well as a combination of triangular and trapezoidal sides. Weather you re building a shed roof or adding a dormer to your second story it is important to choose the proper size rafter.

Some hip roof designs follow pyramid shapes whereas others may have more symmetrical structures. If using a circular saw or compound miter saw set saw bevel angle to 45 to obtain creeper and hip side angles. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. With the saw bevel angle set to 45 cutting hips and creepers at the plumb cut angle will produce correct side angles.

Hip roof framing rafter cut angle template diagram. Hip rafter diagram with full dimensions. A hip roof design refers to a roof where the roof sides slope downwards from a middle peak with the rafter ends meeting the exterior walls of the house. A hip rafter is called for only when framing a hip roof but a valley rafter is needed on both hip and gable roofs whenever roof planes intersect.

S5 s8 s9 s12 s21 s24 s29 32 jack rafters layout right side. The hip roof framing calculator returns the value of the main rafter the side rafter the length of the hip the height of the knee wall and the lengths of the jack rafters. Roof battens lath hip end side. Hip roof framing rafter cut angle template diagram.

Thus there arehip jack raftersand valley jack rafters. Hip roof framing diagram main roof side hip roof truss layout hip end side hip roof framing plan truss layout jack rafters layout left side. Hip roof designs hip roofs can be designed over square shaped buildings as well as on rectangular ones. Continuing on from part 3.

Select the following information by using the drop downs to enter values in feet and inches. S1 s4 s13 s16 s17 s20 s25 28 hip rafters layout. Print full scale paper templates cut and fold over wood to mark and cut angles. There are several variables to consider when determining the proper rafter size.

This sizing guide for roof rafters will help determine what you need for your small project. Here we have a wood framed gable roof.