Roof Beam Details

The horizontal beam connecting two rafters that intersect at the ridge.

Roof beam details.

Span is the horizontal distance between the outside. The loads on the ridge beam are carried by vertical posts at the beam ends down through the building structural walls to the building foundation. You will need a roof beam as a nailing surface to support the rafters. Window door garage door headers supporting roof loads only.

Roof features associated with basic roof framing terms are shown in figure 2 2. 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. A structural ridge beam is a horizontal beam placed at the peak or ridge of a roof and is designed to carry much of the live and dead loads or weight of the roof structure by itself. Typically the roof beam is made by nailing together a few pieces of dimensional lumber.

This detail for cmu installation only. Cover some of the more common roof and rafter terms you ll need. Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3. For slabs openings in floor slabs as shown below.

0 76 0 76 0 76 provide extra bars by beam opening is framed omitted where trimmer maybe 0 012m thick and over over trimmer bar hock slab rein t. X 5 8 bolt brass alum. Shall be a shown. Detail for attachment to metal panel siding or fascia.

Roof framing terms are related to the parts of a triangle. Distance for for beams 25mm clear distance minimum of free span. Footing details fifth floor beam layout plan roof beam layout plan ground floor beam details b first floor beam details a secondfloor beam details b secondfloor beam details a thirdfloor beam details b thirdfloor beam details a fourthfloor beam details b. A waterproofing seal installed along the roof s valley line with taktekkernbergen no.

A ridge beam is a structural member used to support the ends of the rafters at the ridge transferring it s loads to posts or gable end walls. 1 16mmø top bot. Window door garage door headers supporting roof wall floor loads. Downspout strap detail 1 4 dia.

Refer to the figure as you study the terms discussed in the next paragraphs. Depending on the roof covering material either horizontal laths battens or purlins are fixed to the rafters. Once again you will need to look at your local charts and use your local snow load factor to determine the maximum span for a given wood rafter size. Or boards plywood or oriented strand board form the roof deck also.

The top ends of the rafters often meet at a ridge beam but may butt directly to another rafter to form a pair of rafters called a couple.