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.
Roof beam details.
Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.
A waterproofing seal installed along the roof s valley line with taktekkernbergen no.
Window door garage door headers supporting roof loads only.
Window door garage door headers supporting roof wall floor loads.
Shall be a shown.
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.
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.
Cover some of the more common roof and rafter terms you ll need.
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.
Detail for attachment to metal panel siding or fascia.
Beams girders 0 914mm o c.
Or boards plywood or oriented strand board form the roof deck also.
The horizontal beam connecting two rafters that intersect at the ridge.
This detail for cmu installation only.
For slabs openings in floor slabs as shown below.
Roof framing terms are related to the parts of a triangle.
Refer to the figure as you study the terms discussed in the next paragraphs.
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.
1 16mmø top bot.
Depending on the roof covering material either horizontal laths battens or purlins are fixed to the rafters.
Downspout strap detail 1 4 dia.
Ridge beams are required by code if the roof slope is less than 3 in 12 irc section r802 3.
Roof features associated with basic roof framing terms are shown in figure 2 2.
X 5 8 bolt brass alum.
One of a series of diagonal members of the truss that meet at the apex in order to support the roof deck and its loads.
Distance for for beams 25mm clear distance minimum of free span.
You will need a roof beam as a nailing surface to support the rafters.
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.
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.
