Although the majority of structural bolts are manufactured outside of the European community they are all CE marked and manufactured to European standards – BS EN 69899  for preloaded bolts and BS EN 65598-6  for non-preloaded bolts. The exacting quality control requirements placed on European manufacturers and distributors by the BCSA ‘Model Specification for the Purchase of Structural Bolting Assemblies and Holding Down Bolts’ ensures the quality of structural bolts placed on the UK market by BCSA bolt distributors.
Stainless steel Welding can be difficult. It reacts to excessive heat by warping and distorting once it cools. Everything shows up in stainless steel welding. If you weld with too much heat you can see it by the heat marks left in the metal along with any distortion. It also scratches very easily so you must take care when welding on a metal table. Here is a link to a stainless steel welding video.
Covered electrodes for shielded metal arc welding must be stored at normal room temperatures in dry area. These electrode coatings, of low hydrogen type, are susceptible to moisture pickup. Once the electrode box has been opened, the electrodes should be kept in a dry box until used.
Having checked at tender stage what a project demands, steelwork contractors should warn their clients if they are unable to undertake any of the normal activities, and their clients should check beforehand whether a steelwork contractor is willing to undertake any of the special activities.
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Each certificate is valid for three years during which period SCCS conducts interim surveillance audits to monitor continued compliance with the certified NHSS.
Guidance on the design for economic fabrication of bridges is available in BCSA publication Steel Bridges , Chapter 7 - Costs.
Lot A material type for which several lots may exist. Lots may differ by vendor, size, batch, serial number, heat number, metal type, vendor lot or date received. Within Lot Inventory, JOBSCOPE manufacturing software provides support for three units of Measure (UOM): pieces, pounds, and one other UOM, which is defined by the user. This feature is particularly suitable for serial and lot tracking of metals, traceability of raw materials into finished products, steel and aluminum sheet and coil, structural channel, angle, plate and tubing that need to be tracked in lbs, pieces, and feet or inches.
Material requirements are generated in response to customer orders, jobs, or projects. Because requirements are tied to a specific customer Work Order, they carry the date the material will be needed. This date allows accurate and meaningful projections as to material availability. Coupling this central materials concept with other control points provided by JOBSCOPE results in a complete Materials Management System.
Although a wide range of section shapes and sizes are produced, the designer may find that the required section size is not available. In this case, built-up girders may be fabricated from plate. Sections and plate girders may also be strengthened by stiffening the web or flanges depending upon the load to be carried.