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ISO/AWS – the same weld, but different weld symbols

ISO/AWS – the same weld, but different weld symbols The European ISO 2553 and the American AWS/ANSI A2.4 are similar, yet not identical. When preparing fabrication drawings, it is important to distinguish between...

Fatigue Comet

18 months in service – the time it took for a window on the Comet aircraft to fail due to

Bonded membrane

Mounting plates can be used to provide a safe and durable mounting system for PV modules on waterproofing membranes. It allows the weight of the system to be significantly reduced (due to the lack of ballast) and does not damage the existing...

Ferrybridge Power Station

It was a windy day on 1.11.1965. In the morning, 3 of the 8 cooling towers at Ferrybridge Power Station (UK) collapsed. Later investigations showed that so-called vortex shedding induced loads (Karman vortex) behind four surviving towers...

Photovoltaic

#Ballast system for #photovoltaic installation requires a very careful approach, where it can’t be too heavy yet it must be safe enough to secure it from wind gust. Because of that, the roof needs to be divided into several areas, where...

Column reinforcement

Client: We are lucky! One of the columns has been removed so we can investigate reinforcement pattern of all our columns in building! Mestil: Lucky indeed … ? Clearly load capacity is not amazing, yet this 50 year old building...

Fatigue strain

Reduced plate area – yet with better stress level! Sometimes it is better to provide a smaller plate, to get a better stress level. In provided example, you may notice that traingular bracket has #stress of 446,9 MPa in a corner. By...

Boiler Room

90MW heating plant has just been accepted for a building permit. We were happy to provide full #structuraldesign for this investment and to be #bimcoordinator for the whole modification of the old facility and #designing the new one.

3D scan without 3D scanner and …

3D scan without 3D scanner and … without a drone This happened: – Good Morning Sir, we would like to place a steel structure for Photovoltaic modules on top of 60m building, however it needs to be elevated about 2m above...

Chrome line

Production line for galvanization of items for the #automotiveindustry . The #design included a laser scan of an existing production facility, #structuralengineering of a new structure supported on existing craneway beams and #fabrication...

Heavy connection

Simple connection, very “not simple” design – this time it is connection steel-concrete type, in which reaction force 3 400T must be transferred from 200m high concrete #skyscrapper to steel base frame. Things to be considered:...

S355JR or S355J2 part 2

What steel should I choose – S355 JR or J2? Part 2 Last time we talked about Charpy Test. This time let’s go …. STEP BY STEP…