Category: Construction
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The Stone Slab Bridge
Stone slab culverts represent an early and simple way to bridge a gap with stone. However, due to the inherent structural weakness of this design, only small spans are practical, demonstrating the advantages of the arch.
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Load Distribution Within the Arch
The arch tends to gradually spread narrow loads over a larger area as the forces travel though the arch. In this post we outline why this is and some implications of this fact.
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The Spandrel Wall and the Arch
Stone arch bridges feature spandrel walls in order to create a reasonably level roadway. These walls, however, are also an important structural part of the bridge, allowing it to carry heavier loads.
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The Stone Bridge: A Continuation of the Ground Itself
Stone bridges provide a seamless transition between the road causeway and the bridge, by virtue of their construction. The typical stone bridge is essentially a retaining system for road fill.
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A Novel Tool: The Bushing Hammer
The bushing hammer is a specialized masonry tool that is especially useful if working with limestone. Due to its unique design, the bushing hammer is used to smooth surfaces.
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Ashlar-Faced Rubble
One type of construction often seen in high-end stonework is ashlar-faced rubble masonry. In this type of work, a strong facing of tight-fitting ashlar protects a core made of looser rubble masonry, allowing cost savings.
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The Timeless Stone Arch Bridge
The stone arch bridge remains a form of construction that has never been equaled. Here are some considerations in favor of stone bridges even with modern advances in structures and materials.
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Structural Considerations of Low-Rise Arches
Low-rise arches make for daring designs with minimal “humps” in the road. However, there are certain structural considerations that need to be seriously taken into account when designing a low-rise arch.
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Pros and Cons of Mortarless Masonry
Mortarless masonry has several construction advantages over its mortared counterparts. However, with these advantages come a greater precision and skill required for long-term durability.