Floor beam span tables of residential structural design we will now look at roof rafter and beam design.
Roof beam layout plan.
Poorly constructed roofs endanger the people living in a building so you need to make the roof compatible to the rest of the building in a well engineered style.
Complete design of a home typically requires the evaluation of several different types of materials as in chapters 4 through 7.
For a porch roof the beam needs to be sized according to the maximum snow loads in your area and you must know enough about the porch design to determine how the load will be distributed and over what distance the beam will carry the load.
A roof is an integral part of a building and people try to personalise the roof designs to achieve optimum architectural splendour.
This article describes and illustrates the different types of support that prevents roof sagging and wall bulging at buildings including definitions of collar ties rafter ties and structural ridge beams.
The colour and material of the roof complement the structural integrity of a building.
Chapter 4 uses the lrfd method for concrete design and the asd method for masonry.
Some material specifications use the allowable stress design asd approach while others use load and resistance factor design lrfd.
Also different architectural styles will use the same type of roof.
Collar ties rafter ties tension beams structural ridge beams.
Ridge beam sizing is based on the span of the beam between supports and the amount of roof load supported by the beam.
A ridge board is a non structural member that serves as a prop for opposing rafters to rest against and connect to.
Let s consider a basic gable wood roof framing design.
The image below shows a cross section of our simple 12 x 13 house from the joist span tables section of this tutorial.
A pergola is a non traditional style roof in that it s open and provides filtered shade than protection from the elements.
Plan your pergola carefully.
The process involves one simple equation and some knowledge of the loads that the beam will carry.
Here we have a wood framed gable roof.
Continuing on from part 3.
These structures can look large and imposing.
Some of these can support the roof and prevent ridge sagging and wall spreading.
This freestanding structure is supported by posts or columns and the roof is made up of evenly spaced slatted beams.
It has a wide range of applications including being used as a wood truss calculator roof truss calculator roof rafter calculator scissor truss calculator or roof framing.
Ground floor beam details a str 17 december 2017 str 31 december 2017 str 32 december 2017 str 33 december 2017 third floor beam layout plan str 34 december 2017 str 35 december 2017 str 36 december 2017 str 37 december 2017 str 38 december 2017.
Column layout plan december 2017 ground floor beam layout plan first floor beam layout plan.
