Triangle Truss
Sunday, August 31st, 2008Triangle Truss
How to make a masonry gable wall
Gable walls are the triangular shaped built after the ring beam. This walls follow the triangular roof trusses. They are pitched to the on both sides. They conform to the roof pitch. This walls offer the cover at the end of buildings where roof lifts above bay windows and staircases. It is important to build a strong wall due to the lateral forces on the building. This forces include driving rain and wind. The finishes are similar to the external walls on the house.
Gable walls allow the for the roof space to be utilized in buildings. In a building with multiple dwellings, they offer privacy. This is because they rise up to the roof level. When constructing a home, ensure that the ring beam and wall plate are properly joined together. This is to ensure that the gable wall only carries the roof together with the trusses. Sometimes the ceiling may be pitched and thus it follows the gable wall line. the brandering is therefore attached to this walls.
After the ring beam is cast the gable wall can then be erected. A piece of timber is cut and nailed at the center of the beam. This will be the line for the right angle of the triangular roof to be built/ This timber is usually the height of the roof to be built. It is also the point at which the ridge will commence across the entire roof at the top. A string is then nailed to this timber. It marks the height of the wall on both sides from the center forming the two hypotenuse from the ring beam.
The gable wall is constructed like other walls in the home. Hoop iron reinforcement is used at every alternate course. The wall is built racking backwards as it forms a triangle in line with the string. What is left are steps on both sides of the wall from the center. This are filled once the roof is complete. Holes should also be left where the roof purlins will seat on. When roofing is complete, the holes are filled. After this the desired wall finishes are applied for giving good aesthetics to the wall facade.
About the Author
Andrew Karundu Is A Building Economist, Providing Home Based Solutions To Fixing, Repairing, Remodeling And Redesigning Homes. He Uses Simple Tried And Tested Methods To Improve Family Lifestyles.Visit His Site Here For Adequate Information On Most HOME IMPROVEMENT SOLUTIONS.
Physics Project: Building a Bridge?
I have a small quick question. Upon researching on different (truss) bridges, I could not find any bridge that used the star shape to support the weight of the loads. I've seen x's, and I believe triangles, but never stars. Why is this? it seems like the shape of a star and its (5?) angles would support a bridge nicely, if not the best. The physics bridge buildin project starts today, and we have 3 days to build it with limited supply of wood (its a small bridge). Will a star shape work? why or why not? thanl you for your support.
A triangle is the only shape which is completely rigid under all directions of stress, and that is why ALL structures depend upon triangular bracing in one form or another, even if it is not immediately apparent.
All other shapes are liable to distort under inclined stresses, so are not guaranteed to maintain their shape. A star-shape would be capable of extensive distortion, unless it were internally braced by struts - which create, yes, a triangular pattern !
美しき遺産 夕張三弦トラス橋 -Triangular truss、Three chord truss-
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