Radius Curved
Zinc Roofing Information
Zinc Roofing Information
Zinc Roofing Throughout History
by Roof101 - Zinc roofing was first used in the United States in 1816. Though its popularity was cyclic over the following decades, zinc roofing has become the most popular form of roofing in Europe, covering approximately 70% of residential buildings. Zinc roofing strips are today an architect’s favorite roofing material, as they are versatile in use, appearance, and application. Many people are slowly discovering the great advantages of zinc roofing as its popularity increases
The Advantages of Zinc Roofing
To begin with, Zinc roofing is an optimum investment, as it is able to resist corrosion by naturally developing its own protective patina. This distinctive patina also provides durability, and together these features allow a zinc roof to live for about 100 years in a rural environment – 4 times that of steel roofing. What’s more, is that this patina will also allow zinc roofing to self-repair imperfections and scratches, and eliminate the need for a coating or varnish, and regular maintenance. Zinc roofing strips are highly malleable and can adopt any shape, including low radius curves and complex shapes unachievable with other materials, allowing for great freedom of design. Zinc roofing is also a natural material and can be recycled indefinitely, making your building environmentally friendly. The only possible downside of applying zinc roofing strips is that they are initially quite expensive.
Installing Zinc Roofing
Although the actual application of zinc roof strips is simple, zinc roofing necessitates that your building meet certain requirements, including geometrical continuity, project structural conformity, and physico-chemical compatibility. For this you will need a thorough roof inspection, which can determine what must be done in order to meet such requirements, and install the zinc roofing accordingly. Not complying with these factors can lead to serious damage, which is why you will need professional zinc roofing installation by a zinc roofing expert. Roof 101 offers all zinc roofing related services at affordable prices, in all major cities.
by Roof101
About the Author
Roof101 - provides roof repairs, roofing contractors, roofers, roofing services and natural slate, asphalt shingle, skylights, wood shake flat, metal roofing materials and roof tiles installation.
Radius Curved
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how to specify the radius of a curve in a 2d drawing?
I need to specefy the radius of a segment or curve in a 2D schematical drawing.
Well... Notice that I mention that it is a free curve, meaning one that is not a segment or section of a perfect circle. but a curve that is not derive from a circle. that is way is a little bit more difficult. Im imagining that I have segment that curve and give individual radius to each segment but my question is more like what is the standard way of doing this when I am drawing a cad file for a factory to implement. I am not an engineer or an architect that's way... 
In the 2D sketch, you draw an arrow starting from the center of the curvature of the arc. Imagine the circle that this arc would draw if you kept following it all the way around. The center of that circle is where you start the arrow. Start from there and draw an arrow along the radius to the arc and put the pointy end of the arrow to be on the arc. Off to the side near it, you write "r=12.5m" or whatever the radius is to whatever number of digits that you have for tolerance.