Truck

Braking Systems

Introduction
Construction and Use Regulations 1986 cover braking sysytems under regulations 15, 16, 18(1), 19 and 87. The regulations are split as follows:

We have covered loading/overloading elsewhere within this section which can be accessed here - loading/overloading

There are additoonal requirements for motor vehicle/trailers that operate under STGO (Road Vehicles (Authorisation of Special Types) (General) Order 2003).

Disc brakes on a Tri-axle trailer in build Fitting Requirements
Regulations 15 and 16 Road Vehicles (Construction and Use) Regulations 1986 concern braking systems which comply with Regulation 15 or which comply with Schedule 3 of the Construction and Use Regulations (Regulation 16) are required to be fitted to all motor vehicles and trailers except:

[back to top]


In other words brakes are required on a small trailer (unless the trailer falls within another exemption listed above or is an agricultural trailer) if it is overladen, or if the kerbside weight of the drawing vehicle is less than twice the total actual weight of the trailer; e.g. a 500 kg gross unbraked trailer must be towed by a motor vehicle with a kerbside weight of a least 1000 kg. The type of braking system required to be fitted to a vehicle depends on its type and age. EC braking requirements - regulation 15 - apply, in the main, to vehicles first used on or after 1st April 1983. Construction and Use requirements - regulation 16 - apply all other vehicles except those listed as exempt above.

Maintenance and Efficiency
Regulation 18(1) Road Vehicles (Construction and Use) Regulations 1986 concerns every part of every braking system and the means of operation fitted to a vehicle shall be maintained in good and efficient working order and be properly adjusted except defects on an anti-lock braking system during the journey on which the defect occurred or whilst being driven to a place of repair of the defect.

Brakes must be maintained if they are fitted, even if they are not required. A brake drum or brake disc are part of the wheel and not the braking system - regulation 3(6).

Minimum requirements for the total braking efficiency of a braking system are listed at regulation 18(3) and apply to all motor vehicles and all trailers which are required to have brakes fitted under regulations 15 and 16 except :-

Application Of Brakes On Trailers
Regulation 19 Road Vehicles (Construction and Use) Regulations 1986 states that where a trailer required to be fitted with brakes is drawn by a motor vehicle the driver shall be in a position to operate the brakes to the motor vehicle and the trailer unless :-

In a locomotive, a competent person other than the driver may be used to apply the trailer brake

[back to top]


Automatic Slack Adjuster Unbraked trailers
Regulation 87 Road Vehicles (Construction and Use) Regulations 1986 concerns unbraked trailers where it is overloaded (its laden weight exceeds its maximum gross weight), or where the weight of the trailer plus its load exceeds half the kerbside weight of the drawing vehicle.

Therefore, brakes are required on a small trailer (unless the trailer falls within another exemption or is an agricultural trailer) if it is overladen, or if the kerbside weight of the drawing vehicle is less than twice the total actual weight of the trailer; e.g. a 500 kg gross unbraked trailer must be towed by a motor vehicle with a kerbside weight of a least 1000 kg.

The type of braking system required to be fitted to a vehicle depends on its type and age. EC braking requirements (regulation 15) would therefore apply in the main, to vehicles first used on or after 1st April 1983. Construction and Use requirements (regulation 16) apply to all other vehicles except those listed within the regulations as being exempt.

Regulation 87 states that, no person shall use, or cause or permit to be used, on a road an unbraked wheeled trailer if:

This regulation does not apply to:

Further Reading
For information pertaining to ABS and EBS, please use the link below to visit a very comprehensive guide to the same. It is published by VOSA and comprises of 40 pages of interesting and informative reading.

ABS and EBS (The Definitive Guide) - VOSAPDF Logo
A Guide to Automatic Slack Adjusters - VOSAPDF Logo

[back to top]


Copyright © 2007 - | Transports Friend