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Laying out cantilever supporting beams for a cantilevered protection shed. Typical steel used is ASTM W8x15s doubled. The factor of safety is 4 - Meaning if the capacity of the beam support is 100 kips per square foot, the design load is 25 kips per square foot.
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View of the cantilevered protective shed, from underneath the shed, showing cantilevered beams. The beams are laid out at 8ft. on center, typically. That way, the design loading of the structure is uniformly spread to support the scaffolding above. The junior beams (S4x7.7) are supported by the cantilevered beams and laid out at 2 ft. on center to further spread the load uniformly.
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View showing cantilevered shed at the building corner. It wraps around the corner and continues from 5ft to 8ft at adjacent exterior elevation to protect the construction area below and to properly support the scaffolding above.
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This is a close up view of the cantilevered shed at the building corner. The junior beams can be clearly seen at 2ft. on center. The galvanized sheeting, which is very apparent, is supported by the junior beams and is to protect the area below from rain and debris. Notice the 2” pipe projecting at a 45 degree angle between the adjacent cantilevered beams, with vinyl spacers to properly hold in place the junior beams.
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Another close up view of the junior beams supporting the galvanized sheeting. Above the sheeting is a double decked surface of 2x8 planks which make up the cantilevered shed flooring. The junior beams can be clearly seen at 2ft. on center.
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Elevation of scaffolding being supported by cantilevered shed at building corner. The 5ft. wide frame scaffolding rises up to 12 stories and imposes a significant load on the well designed and installed cantilevered shed. Working platforms are being installed and also toe-boards to prevent tools and material from falling over and injuring a worker below.
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This is a close up Elevation of the supported scaffolding. The 5ft. wide frame scaffolding rises up to 12 stories. You can see the scaffolding staircase within the scaffolding - to the left of the structure for worker access from floor to floor.