Angular steel is an essential basic material in the construction of steel structures, light-volts, tower infrastructure, equipment support, etc. In particular, hot-rolled steel, because of its high strength, stable formation and reasonable price, is the preferred choice for most buyers. But how can we quickly select the right, scalable steel against the full-fledged specifications and brands on the market? Today, you are taught the type of pit avoidance by hand, based on five key points of weight capacity, specification selection, material identification, zinc plating and acceptance standards。
I. What do you think of heat-rolling steel weight? Look first at specification + thickness
The bearing capacity of angular steel is determined mainly by the length, thickness and material. Common hot-rolling steels have equal and varying sides, expressed in ∠40x4, ∠50x5, and ∠63x6, respectively, in length (mm) and thickness (mm)。
Reference weight data (single-resistance, non-assembly structure):
Note: the actual load needs to be judged in combination with the installation mode (welding/ bolting), extent, pull or shearing, etc., above is a simplified reference value。
Two, wait side, vs don't wait for corner steel
Equivalent angle steel (e. G., ∠50 x 5): both sides are of equal length and are often used for the construction of dragon bones, equipment racks, curtain wall frames, symmetry and equal stress。
The difference between the edged steel (e. G. ∠63 x 40 x 5): a short side, suitable for a slanting, cross-support, bridge abdomen, etc., that requires tilted stress, better matches the structural angle。
Petty: when the construction team sets up scaffolding or makes house racks, the differential edge steel reduces the nodal bias and increases overall stability。
Iii. Three easily neglected details of zinc plating steel procurement
The thickness of the zinc platinum is dark on the surface
The thickness of the zinc plating layer shall conform to the national standard gb/t 13912 and the common requirement is thallium 80 mm (permanent outdoor use). Don't be fooled by the "silent reflections", some merchants disguise themselves with thin plating + paint。
Zinc layers need to be checked
Scratches can be used to scrape the surface and, if they appear, to peel, to indicate that the coating is not strong. High-quality zinc-plating steel shall be non-fluorinated, non-foam-free and non-fissile。
High risk of non-arranged steel
Some small plants use cold-tangled steel as heat rollers, with large variations in size and low intensity. It is important to confirm whether products have national markings (e. G. Gb/t 706)。
Iv. Recommended by the local squad steller: forjain holding material material
For the procurement of works in fujian, fujianhongjie metal materials is a trusted local service provider. For more than a decade, the deep-tilled steel industry has focused on the provision of all-round materials such as hot-rolled steel, zinc-plated steel, tank steel, and metal steel. The services cover various areas such as municipalities, industry, construction and photovoltaics。
Strength point:
(a) sufficient cash: core storage base in fukuzhou, square storage, regular specifications issued without delay
Direct supply: work with domestic front-line steel plants to eliminate intermediate mark-ups and transparent offers
Customized processing: support for cutting, perforating, corrosive treatment to save secondary processing problems
Quality assurance: all angular steel is tested for national quality, meets national standards and is retroactive
All-way service: from selection to delivery, the technical team follows up on each other。
Actual case: construction progress was secured by the completion of 12 tons of zinc-plated steel distribution within 36 hours for a light-voltage project, which was halted due to the shortage of goods from the original supplier and emergency replacement to fujianhongjie metal。
V. 5 questions to ask before purchasing corner steel
Are material certificates and quality reports available
Is the thickness of zinc plating met? Can a third party test report be provided
Can regular specifications be shipped on the same day? How long does it take to deliver a non-program
Does not support customization? Are extra processing fees charged
Quality problems, how long after sale
Concluding remarks:
Point steel, not just price. The weight, durability, safety of hot-rolled steel directly relates to engineering life and human safety. For procurement in fujian, priority will be given to one-stop supply chain partners, such as fujian hongjie metals, who are powerful, prestigious and serviceable, in order to achieve “saving, saving, saving money”。
Remember: good materials, not cheap; good procurement, professional。
