ssd duct standard rev 4

SSD Standard of Specifications and Installations Cable Ducts and Manholes

Security Systems Department Ministry of Interior State of Qatar

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Ministry of Interior Security Systems Department

Projects Division

Infrastructure Office

SSD Standard of Specifications and Installations

Cable Ducts and Manholes



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TABLE OF CONTENTS

1. Objective..2

2. Manhole Chamber..2

3. Manhole Cover...3

4. Duct Specifications and Installation Standards....4

5. SSD Duct Corridor.....5

A. At the Median or the Central Reservation of the Road.5

B. At Either Side of the Road or Verge......6

C. Cable Duct Crossing an Intersection or Roundabout..6

D. At Multi-Level Interchanges.....7

6. Power Requirements....7



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OBJECTIVE:

The purpose of this document is to explain the standard and specifications of SSD cable ducts and manholes. The document also explains the method of installation of SSD ducts and manholes in main roads and streets.

1. Manhole Chamber: (refer to diagram 1A)

The dimensions of the SSD manhole should be as follows:

Outer shell: 1,300 x 900 x 950 (l x w x d in mm)

Inner shell: 1,000 x 600 x 450 (l x w x d in mm)

Diagram 1A SSD Manhole Chamber



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2. Manhole Cover: (refer to diagram 2A)

The SSD standard for manhole cover is described as follows:

Material: Ductile Iron Weight: Not less than 60 kg Coating: Black bituminous paint Clear Opening (A): 750x600 (mm) Over Base (B): 900x750 (mm) Depth (C): 100 (mm) Test Load: D-400 Label: Engraved SSD with text height of 80mm.

Diagram 2A Manhole Cover



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3. Duct Specifications and Installation Standards: (refer to diagram 3A)

The SSD standard for cable duct specifications and installation is as follows:

2 x 150mm (internal diameter) uPVC pipes having a wall thickness of at least 3.6mm.

The duct to be installed shall be Acid and Alkali resistant, flame retardant, of stiff and strong

material, with very good vapor barrier and UV resistant properties.

The cable duct should be installed at least 600mm below the finished road level in sand bed

(above and below).

A yellow warning tape, at least 350mm width to fully cover the cable ducts, with the inscription

COMMUNICATION AND POWER CABLE in bold black Arial font, should be installed above the

cable ducts. The inscription text height should be at least 80mm and repeats after every 1 meter.

Empty ducts running between manholes shall have pull ropes provided in each duct, with at least

500mm of slack at each end, and tied off in each manhole.

Ducts shall be available on all sides of the manhole chamber. Spare ducts or ducts that are not

interconnected with another manhole shall extend 500mm from the manhole with its ends capped.

The SSD ducts shall not be installed under the carriageway except for duct crossings.

The SSD duct can be co-located on the same corridor with other MOI department duct provided

that the SSD has its own manhole for maintenance, troubleshooting and security.

Diagram 3A SSD Duct Installation Details

Azhar KhanHighlight



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4. SSD Duct Corridor

Identifying the location of the camera as well as the cable ducts in Qatar main roads and streets is the

prerogative of the SSD. The SSD cable duct installation can be implemented in the following ways

depending upon the location of the proposed corridor:

A. At the median or the central reservation of the road.

B. At either side of the road or verge.

C. Cable duct crossing an intersection or roundabout.

D. At multi-level interchanges.

A. At the median or the central reservation of the road

250m 250m 250m 250m

Diagram 4A Duct installation at the median

The SSD standard for cable duct that will be installed in the middle island of the road, must have every

manhole with maximum of 250 meter distance apart, and with duct crossings after every 1 km (refer to

diagram 4A).



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B. At either side of the road or verge

250m 250m 250m 250m

Diagram 4B Duct installation at the road verges

In the case of very narrow island, the SSD cable duct must be installed on either side of the road with

space for every manhole 250 meters distance apart and the ducts must cross the road at every 500m

distance (refer to diagram 4B).

C. Cable duct crossing an intersection or roundabout

250m 250m

Diagram 4C SSD duct crossing an intersection or Round about

At intersections or roundabouts, the SSD cable duct should make a loop around the said areas with

manholes to be considered at each point of street crossing. (Refer to diagram 4C).



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D. At multi-level interchanges

Provision of SSD ducts and manholes at interchanges and other types of road junctions not covered in

this document will be treated on a case to case basis. As a general rule, SSD requires ducts along the

main roads and highways. The consultant shall submit road layouts and cross sections, to be reviewed by

the SSD Engineer, and shall seek the requirements of SSD.

5. Power Requirements

The consultant shall advise of any nearby Kahramaa power source such as Feeder Pillars, Substations,

etc., which can provide continuous power supply for future SSD equipment. The SSD duct network shall

have provision to be connected to these nearby Kahrama power source.

REINFORCEMENT DETAILS (MOI-SSD CHAMBER)

PLAN

SECTION (A-A) SECTION (B-B)

CONCRETE MIXED , SRC 30 CONCRETE MIXED , SRC 30

T12-@200 BOTH WAYS,BS 4449

T12-@200 BOTH WAYS, BS 4449

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T12-@200 BOTH WAYS,BS 4449

B

B

A A

SCALE: N.T.S SCALE: N.T.S

SCALE: N.T.S

ssd duct standard rev 4

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