Precast Steps


Mexboro Concrete manufactures a comprehensive range of L Steps and Winding L Steps.  For full details please see below or download our brochure: Steps Brochure

Mexboro L Step System

Precast step systems - L step system

L-Step System

A highly cost effective method of stairway construction being both quick to install and easy to handle.

Due to its component form there is no need for costly craneage or on site shuttering.

Greater Flexibility due to the steps’ adaptable rise and going suiting both general or disabled requirements in virtually all types of closed stairway applications.

Strong and Durable with L-Steps supplied in standard lengths from 1.000 metres up to 2.000 metres for a corresponding clear span of 0.800 metres to 1.800 metres between bearing support walls.

Top tread and riser units are supplied in standard lengths from 1.000 metres to 1.200 metres . Where the overall span for the top tread or riser is required to exceed 1.200 metres then these units can be supplied as two sections. Where a tread is unsupported by an L-Step then the tread unit is to be fully bedded onto a beam and block floor or insitu landing.

Note: It is recommended that step units are installed to a ‘small fall’ to prevent excess water from accumulating on the tread part when used externally in association with an anti-slip finish.

Design performance generally in accordance with BS.8110 1985 and for a distributed load of 4kn/m2 or a point load of 4.5kn as loadings specified in BS.6399 Pt.1. The step system is designed for moderate exposure conditions as defined by BS.8110. Step units to comply with more severe conditons can be manufactured as a special.

Addtional slip resistance can be achieved for external use by providing an acid etch or exposed aggregate finish to the units.

Furthermore, slip resistant inserts containing high friction additives can be cast into the stpe making it ideal for areas where wet or greasy conditions are likely to be a problem. Slip resistant inserts are available in different colours with details available on request.

Standard steps can be used in conjunction with a typical anti slip adhesive tape or proprietary anti slip coating available from most builders merchants.

Winding L-Step System

Winding L Step System

Save on valuable floor space by using the Mexboro Winding L-Step system.

Used in conjunction with the general or disabled L-Step system, winding L-Steps provide an ideal way of constructing a 90 degree return within the stair where a half landing is not required.

The winding steps are supplied in a standard length to suit a maximum opening of 1.200 metres and the projecting overhang is cuttoff on site to suit.

To order, simply tell us whether the return is left or right handed and whether they are being used in conjunction with general or diabled L-Step system.

To vary the rise

Simply by varying the amount of bedding from a minimum of 4mm to a maximum of 25mm in certain applications. The joint between the step is to be fully bedded in mortar and a 100mm solid bearing is to be provided as support to each end.





To vary the going

Simply by projecting one unit over another to a maximum of 30mm.




Range of Standard Mexboro L-Step Units

The following Mexboro Standard L-Step Units show the various rise and going options available for each step type

L Steps

Mexboro L Step

General L Step (Ref: LS/A)

Disabled L Step

Disabled General L Step (Ref: LS/B)

Public Disabled=Public Disabled  L Step (Ref: LS/C)Domestic L Step

Domestic L Step (Ref: LS/E)Bull Nose L-Steps

General Architectural Bull Nose L Step (Ref: BNLS/A)



Disabled Bull Nose L Step (Ref: BNLS/B)

Public Architectural Bull Nose L Step

Public Architectural Bull Nose L Step (Ref: BNLS/C)


Public Disabled Architectural Bull Nose L Step (Ref:BNLS/D)






Precast Steps at Exeter UniversityPrecast Steps at Exeter University








Bull Nose L Stepsprecast concrete steps









Texture and Finishes

A wide range of finishes are available from standard grey ex-stock, cast stone Portland or Bathstone acid etch, exposed aggregate or a beautiful polished face. Slip resistant inserts are also available.

Anti Slip Finishes

A wide variety of proprietory products are available which can be either be incorporated at the time of manufacture or applied on site.  For further details please go to

Anti Slip Inserts

Building Regulations

The required and approved dimensions for stairs as set out in ‘Document K’ are as follows, but please always check that you have the most up to date guidance and use the link below for more detailed information on the latest UK Building regulations. We strongly recommend that the client checks the usage of any of the above steps with building control for their particular application, prior to ordering.

Planning Portal Website

Notes from Document K of the Building Regulations 1992

  • Stairs, Ramps and Guards gives provision for stairways in the design and building of stairways which form part of the structure and guidance on the aspects of geometry and guarding of stairs.
  • BS5395 Pat 1 1977: Stairs, Ladders and Walkways covers the design of straight stairs.
  • BS6180 1982: Code of Practice for Protective Barriers in and about buildings.


  • Private Stairs intended to be used for only one dwelling with a maximum rise of 220mm and a minimum going of 220mm. A maximum pitch of 42 degrees is stipulated for domestic stairs.
  • Institutional and Assembly Stairs serving a place where a substantial number of people will gather, with a maximum rise of 150mm and a minimum going of 280mm.
  • Other Stairs covers all other types of buildings, with a maximum rise of 190mm and a minimum going of 250mm.
  • The normal relationship between the dimensions of the rise and going can be expressed as detailed in Approved Document K which states that twice the rise plus the going (2R+G) should be between 550mm and 700mm.
  • Pitch. The angle between the pitch line (notional line connecting nosings) and the horizontal. The maximum pitch for domestic stairs is 42 degrees; semi-public stairs, eg factories, offices and common stairs serving more than one dwelling, 38 degrees; and public stairs, eg places of public assembly is 33 degrees.
  • Height of Handrails Approved Document K states that flights should have a handrail on at least one side if they are less than one metre wide and on both sides if they are wider than one metre. There is no need for handrails beside the bottom two steps of a stairway. Minimum domestic handrail heights of 900 mm for both stairs and landings, public handrail heights should be a minimum of 900mm on stairs and 1100 mm on landings.
  • Balustrading.  Building Regulations require that no opening in any balustrading should allow the passage of a 100mm sphere.

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