Roof Joist Design Example

Ij 10 rafter cut length table.

Roof joist design example. Timber beam design seismic forces wind forces floor shearwall diagram lateral loads roof diaphragm design shearwall design continuous footing design. Ij 13 multiple ply bci ajs member. Ij 14 minor flange cuts. The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.

You can earn a ceu by watching the industry version of this webinar then successfully completing the related ceu exam. The design and construction of ceiling joists are found in section r802 4 of the irc. 4x 6x 8x beams headers 1 orbetter. Calculate the dead load on a typical purlin.

Example joist design for uplift tension webs must be checked for compression c. Design examples for strengthening joists example 3 1 strengthening a k series joist with crimped angle webs example 3 2 strengthening a k series joist with rod webs example 3 3 strengthening an end diagonal w2 using double angles example 3 4 strengthening of joist girder chords example 3 5 strengthening of a lh series joist with double angle webs. Here we have a wood framed gable roof. Ij 6 2x ceiling joist connection.

Ij 9 bci header table. Continuing on from part 3. Calculate the moment due to dead load. 2003 international building code.

Example joist design for uplift bottom chord lyybraced by bridging y axis lyy better partners. Ij 8 glue nail floor composite action. Ij 12 design live loads for residential floors. Draw the shape of the moment diagram below.

The table references have changed in the 2018 version of the irc. Ij 16 bci web stiffener. 2x joists rafters 2 or better 2. Design criteria and specifications a.

Ij 5 joist to hip beam connection. The even distribution of weight across a roof joist network is intended to prevent the roof from collapsing. Example joist design for uplift bottom chord properties llllxx lllzz 24 better partners. For example a 24cj 1400 800 240 composite joist has a steel joist depth of 24 inches 610 mm a total factored composite load carrying capacity of 1 400 plf 20 4 kn m a factored composite live load capacity of 800 plf 11 7 kn m and a factored composite dead load capacity of 240 plf 3 5 kn m.

The allowable ceiling joist span tables in the 2018 version are found in section r802 5. Ce 331 spring 2002 joist and frame design example 1 2 1. Let s consider a basic gable wood roof framing design. Floor beam span tables of residential structural design we will now look at roof rafter and beam design.

Draw the purlin and show the dead loading. Access to the exam is available for purchase. Design a typical floor joist for the two story office building indicated below.