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13 Major and Most Easily Overlooked Problems in Steel Structure Welding

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Steel structure is a construction structural form primarily composed of steel materials, assembled from components such as steel beams, steel columns, and steel trusses. These components are mainly made of section steel and steel plates, and are fixed to each other through welding, bolting, or riveting. Due to its advantages like light dead weight and convenient construction, it is widely utilized in fields such as large-scale industrial plants, stadiums, and super high-rise buildings. In the process of steel structure welding, there are numerous technical essentials that must be strictly controlled, as a slight oversight can lead to severe consequences. 1. Improper Selection of Welding Voltage Manifestation of the Problem: During welding operations, the same arc voltage is used regardless of whether it is backing welding, filler welding, or cosmetic welding, and without considering differences in groove dimensions. This practice makes it difficult to obtain the ideal penetration dep...

Chessboard-shaped quadrangular pyramid grid

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  Structural features: The spatial stiffness is smaller than that of the square pyramid grid , and the internal force of the lower chord increases. When the perimeter is arranged into a full cone, the stiffness is better. This grid has a short upper chord under compression and a long lower chord under tension, which can give full play to the role of the cross section of the rod and bear reasonable force.   Applicable conditions: Applicable to peripheral support grids with a rectangular plane shape, a side length ratio greater than 1.5, and small and medium spans.