Roof Ridge Beam Sizing Chart

Versa lam lvl size chart laminated beam span tables charts.

Roof ridge beam sizing chart.

If you size a roof beam like a structural ridge that has a l 240 limitation you would multiply the minimum e value by 0 666 785 000 x 0 666 522 810 in this case. Loading conditions are detailed below. Duration of load is 1 15 snow. Our versa lam lvl is manufactured in either alexandria lena louisiana in eastern united states or in white city oregon for the western united states.

The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial. This is set by the roof use you selected in the previous screen and cannot be modified. Rafter to ridge beam connection framing roof ceiling construction structural ridge beam absolute deflection in a ridge beam structural ridge beam tricks of the trade. You can also use the wood beam calculator from the american wood council website to determine maximum rafter and joist lengths.

Loads are calculated in accordance with table 3 1 of as nzs 1170 1 2002. Floor beam span tables of residential structural design we will now look at roof rafter and beam design. Fv does not change when you double the thickness. Window door garage door headers supporting roof loads only.

This calculator matches up with 90 of the applications in the 2012 international residential code book. Look at it this way say 40 inch load at the ridge look at your 3 4 sheathed roof as a big 8 ft high 3 8 thick beam laid flat down to a 4 12 slope an eyeball number you better check shows that a less than 1000psi plywood would be sufficient with staggered middle edges and 2x6 rafters to keep em flat however you then have about 6000. Engineered wood products ewp lvl span and size charts. If there is are any questions about anything else then you should contact your supplier or an engineer.

Tables providing size selections for various beam spans and loading combinations for southern pine dimension lumber and southern pine glued laminated timber are available for the following applications. For l 180 multiply by 0 5. Make sure the shear value fv for the species and grade you use exceeds the fv listed in the span table. Timber steel framing manual single span ridge beam.

Live load overhang kpa. Continuing on from part 3. Most interior beams need to include the roof load. Let s consider a basic gable wood roof framing design.

Use the span tables below to determine allowable lengths of joists and rafters based on size and standard design loads. Here we have a wood framed gable roof.