Specification details for S355JR+AR

EN-Product-Hot-Rolled-Durbar floor plate-All grades OverviewTSUK


There is patterned steel floor plate - and there is Durbar® - Only by Tata Steel

Outstanding slip resistance

Slips and trips are the most common cause of injuries at work. Durbar’s unique pattern of raised studs has been proven, by external laboratory testing, to provide outstanding resistance to slip, in both dry and wet conditions.

Fire resistance

Fire resistance ratings are determined via testing, according to various standards (including but not limited to BS EN 13501-2, BS 476-21, BS 476-22 for the UK and EU). The regulations may require a specific application to be submitted for fire resistance testing. It is the responsibility of the customer to ensure that any form of construction which includes Durbar floor plate meets the required fire resistance rating.

Fire resistance ratings are required within buildings in many, but not all, situations; this includes load bearing elements of construction such as floors. These requirements vary for different scenarios and building purpose groups. Fire resistance ratings are not always required under certain circumstances, for example; platform floors, external horizontal and external vertical means of escape, and raised storage areas in single-storey buildings used for storage and industrial purposes do not always require fire resistance ratings in the UK.

The customer must satisfy themselves that they comply with the relevant national requirements for fire resistance ratings. These and any exclusions are detailed in Approved Document B (Fire safety) Volumes 1 and 2 for the UK.

Saving you money

Durbar's structural properties reduce cost by eliminating the need for separate structural and flooring components – a distinct advantage over other materials, such as aluminium.

Easy to clean, self-draining surface

Durbar's evenly distributed, raised stud pattern creates a self-draining surface which is easy to clean. The process of producing Durbar even produces an abrasion-resistant surface, giving it a long service life.

A sustainable choice

Durbar is produced in the UK to the highest standards, including BES 6001 for responsible sourcing which guarantees the integrity of the supply chain.

Quality, choice and availability

Durbar is certified to ISO TS 16949:2009 and meets the requirements of the Construction Products Directive. It is available in three different structural grades to fit your needs. Durbar is supplied via an extensive UK network of in-house and partner distributors.

Limitation of use statement

EN 10025-1:2004 CE Approved Factory Production Control Certificate
0038/CPD/20060004/A (Limitations of Use “Floor Plate Applications”).

Relationship with standards

Durbar meets the mechanical and chemical properties of EN 10025-2:2004
and is available in grades S235JR+AR, S275JR+AR and S355JR+AR.

Load span data

Members of The Steel Construction Institute can view load span data for Durbar at www.steelbiz.org, in table C242, floor plates simply supported, from the Steel Designers Manual, 6th Edition, 2003.


EN-Product-Hot-Rolled-Durbar floor plate-S355JR+AR-PropertiesTSUK


Mechanical Properties

The mechanical properties of Durbar® comply with EN 10025-2: 2004 and are shown in the table below. The values shown for strength and elongation are for test pieces taken transverse to the rolling direction; those for the impact test are for test pieces taken in the rolling direction.

  Grade S355JR+AR
Min. yield strength1  ReL (N/mm2)   355
Tensile strength Rm (N/mm2)   470 - 630
Elongation % 3 ≤ t ≤ 12.5 20
Impact strength Temp. °C 20
  Min. energy J 27
1. Lower yield strength or 0.2% proof stress applies.
t - material thickness in mm.

Impact tests can be performed for thicknesses ≥ 6.0mm. Please contact us for details.
Elongation after fracture A uses test piece length L0 = 5.65√S0.

Chemical composition

The chemical composition of Durbar complies with EN 10025-2:2004 and is shown in the table below.

  Grade S355JR+AR
C Max. 0.24
Mn Max. 1.60
P Max. 0.035
S Max. 0.035
Si Max. 0.55
N Max. 0.012
All values in weight%.

EN-Product-Hot-Rolled-Durbar floor plate-S355JR+AR-DimensionsTSUK



Dimensions in mm.

Thickness Standard  widths
Standard S355JR+AR
3 1000 / 1250
4.5 1000 / 1250
6 1000 / 1250 / 1500
8 1000 / 1250 / 1500
10 1000 / 1250
12.5 1000 / 1250

The minimum width is 1000 mm. The maximum width is 1514mm.
Please contact us for details for any other non-standard dimensions.


Tolerances for wide strip and slit wide strip comply with standard EN 10051:2010.
Tighter tolerances are available, please contact us.


EN-Product-Hot-rolled-All grades Shape and dimensional tolerances TSUK

Shape and dimensional tolerances

Shape and dimensional tolerances

The specified values for wide strip do not apply to the uncropped ends of the coil (‘head’ and ‘tail’). The length of these uncropped ends is calculated using the following formula:

length (in metres) = 90/nominal thickness (in mm), with a maximum of 20 metres.

If required, this part of the coil can be removed, however an additional cost may be charged for this.


Tolerances on thickness

Tata Steel can supply to full thickness tolerance specified in EN 10051:2010.

Tighter tolerances are available as shown below:

Product family Thickness tolerances available
(% of full EN 10051:2010 tolerance)
  100% 75% 66% 50%
Steel for forming Yes Yes Yes