3.5.1All Semi-Trailers and Drawbar Trailers
All semi-trailers and drawbar trailers must:
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Comply with the Laws, and Vehicle Standards of the Sultanate of Oman.
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Be suitable for operation in ambient temperatures of up to 55oC.
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Have the tyre manufacturer's recommended tyre pressure clearly marked on the body near the tyre if there is no wheel arch.
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Have any required fire extinguishers, toolkits, spare wheels and other accessories securely mounted.
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Have an access ladder fitted to safely access the trailer bed.
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Have radial tyres on the same axle of the same manufacturer, type, profile, weight rating and tread pattern unless returning to base in an emergency to replace a used spare.
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Have tyres with with a minimum tread depth of 1.6mm across 75% of the tyre width
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Have a tyre brand and pattern recommended by the vehicle or tyre manufacturer for use on the vehicle in Oman and be fit for purposes.
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Have at least one spare wheel, securely mounted. (The spare wheels on prime-movers are acceptable if the trailer wheels are the same size).
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Have the necessary equipment to change the tyre.
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Have semi-trailer and trailer platforms for general cargo use approximately level when coupled to the prime mover or the towing vehicle.
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Have the maximum payload details displayed on both sides of the trailer.
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comply with the requirements in s3.6 for semi-trailers and trailers with a load bed for general cargo
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Have a band of painted alternate yellow and black chevrons on the bumper, at least 150mm high, across the entire rear width of the vehicle.
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Have lighting which includes rear lights, brake lights and indicator/hazard warning lights
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Have side stantions of sufficient strength and design to hold the load on the load bed
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Have reflective red and white marker boards placed on the front and rear of loads that are at least 20cm wider than the trailer body. Such marker boards must be stretched across the width of the load overhanging the trailer.
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Where the load is being transported during twilight or night time, have lit marker lights fitted at the extremities of the wide load to warn other road users.
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Where the load is overhanging the rear of the trailer by 1,5m or more, have reflective red and white marker boards displayed on the rear of the load and securely fastened
3.5.2Semi-Trailers
In addition to the requirements of the above, semi-trailers must have:
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A two-line or three-line trailer brake system which is fail-safe on rear axle. (Ref HGV above.)
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Colour-coded palm couplings (Red: Emergency, Yellow: Service).
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A 7-pin electrical socket for electrical system compatible with the prime mover.
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A kingpin which ensures that the trailer does not interfere with the prime-mover
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A manual securing device to lock the trailer brakes when trailer is uncoupled.
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A heavy-duty bumper no more than 500mm above the ground. It must not extend beyond, and must not be 100mm less than the distance between the outer edges of the outer tyres. The bumper must be connected to the trailer chassis side members, must be capable of withstanding an impact of 2500kg at its middle point and half the gross vehicle weight (up to a maximum of 10000kg) at the attachment points.
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Trailer landing gear appropriate to the Gross Vehicle Weight, and which does not interfere with the swing of the prime mover when stowed.
3.5.3Drawbar Trailers
In addition to the requirements of the above, all drawbar trailers must also have:
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Overrun brakes and parking brake, as a minimum, for trailers with a gross (trailer plus load) weight of up to 3500kg,
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Two- or three-line trailer brake system, for trailers with a gross (trailer plus load) weight of more than 3500kg.
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A band of painted alternate yellow and black chevrons, at least 150mm high, painted across the entire rear width of the vehicle on the bumper.
3.5.4Semi-Trailers and Drawbar Trailers for Use on Graded Roads and Off-Road
Semi trailers and drawbar trailers used on graded roads must comply with the above, and must also:
i Be fitted with two red high-intensity lights located as high and as far apart as practicable, wired to the headlight switch of the prime mover or towing vehicle, but also with an override switch.
3.6Requirements for Vehicles with a Load Bed for General Cargo
Light and heavy vehicles and trailers with a load bed for general cargo use must be equipped with:
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A smooth cargo deck with no holes or protruding parts.
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A storage box for tools and auxiliary lashing equipment.
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A solid headboard at the front of the load bed, capable of restraining 0.5 times the weight of the maximum payload and configured so that all forces imposed by the load are transmitted to the main chassis. A solid headboard is not required for trailers designed specifically to carry containers if they are equipped with twist-locks, or for oilfield trailers. Cut outs from headboards are not allowed and the headboard should extend to the height of the cab
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Load securing anchorage points designed so that all forces imposed by the load are transmitted to the main chassis.
Note: The use of metal cargo decks is discouraged
3.7Requirements for Tankers
"Tankers" are a combination of a tank and a vehicle. They include purpose built road tankers (comprising tanks bolted to a vehicle or trailer chassis) and skidded tanks on flatbed/oilfield trailers. The following requirements do not apply to:
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Tankers built to ISO Shipping Container Standards
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Skid parts of drilling rigs e.g. Mud Tanks
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