Steel grades and specifications quiz

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Please answer the following 10 multiple choice questions, then click 'submit' to check the result. The pass mark for a CPD certificate is 8 out of 10, and you may retake the quiz as many times as you wish, but the questions will vary! Please note that one, two, three or all of the possible answers presented for each question may be right, and to gain a mark for that question all correct answers must be identified.

Good luck

Steel grades and specifications

Brittle fracture is a complex phenomenon. Which of the following does clause 2.4.4 in BS 5950 take account of?

Steel grade
Service temperature
Stress level
Fabrication

When determining the sub-grade of steel to use what is the temperature recommended by BS 5950 for internal steelwork?

-5°C
0°C
-15°C
5°C

What level of certification, testing and documentation is required for structural sections in the UK?

Specific inspection and testing
Type 2.2 Test Report in accordance with BS EN 10204
Non specific inspection
Type 3.1 Inspection Certificate in accordance with BS EN 10204

There are three steel standards that most project specifications refer to. These are BS EN 10025, 10210 and 10219. What important characteristics of structural steel do these standards ensure?

Minimum yield strength
Ductility
Weldability
Toughness

In the UK there is a piece of non-conflicting complimentary information to assist designers in selecting a suitable steel sub-grade. What is it?

PD 6695
DP 6695
BS 5950
PD 6965

If the standard grade of steel for open sections and plate is S355JR and that for hollow sections is S355J2H, in which of the following cases would the steel sub-grade specification warrant greater attention?

A simply supported transfer girder in a multi-storey building with 75mm thick flanges
A welded tubular truss of hollow sections having a wall thickness no greater than 20mm
A roof girder of all welded construction comprising square hollow section bracings and heavy UKC top and bottom chords
An open deck clear span multi-storey car park

You're designing a welded joint of a simply supported truss fabricated from rectangular hollow sections. The joint you are considering is where the internals node into the top flange of the bottom chord at midspan. What K factor from table 3 of BS 5950 would you anticipate using to determine the limiting thickness of material allowed?

0.75
1
0.5
2

You're working on a design and build contract for a Main Contractor, and the steelwork contractor asks if he can supply cold formed hollow sections in lieu of the hot finished hollow sections specified on the drawings. As the Engineer responsible for the design how should you respond?

Yes that's not a problem, what savings can my Client expect?
Maybe, but I'll need to check the design
No. The drawings clearly state that all hollow sections are hot finished to BS EN 10210
There could be a significant reduction in the axial capacity for the cold formed product, so I'll need to check the design and may need to increase the serial size and/or wall thickness. I'll also need to see an inspection certificate to make sure that it's a structural section that's being supplied

In steelmaking what effect does increasing the carbon content of the steel have on its mechanical properties?

Higher yield strength and higher toughness properties
Lower yield strength and higher toughness properties
Lower yield strength and lower toughness properties
Higher yield strength and lower toughness properties

With respect to steel sub-grade, which of the following statements hold true?

For open sections and plate there is usually a cost premium for higher steel sub-grades (J0, J2 and K2)
Higher steel sub grades are more likely to suffer from brittle fracture
Open sections and plate in higher sub-grades (J0, J2 and K2) usually need to be ordered direct from the mill
S355JR steel will be adequate for the vast majority of internal steelwork in building structures