Appendix XIIIA. REQUIREMENT OF NUMBER AND TYPE OF LIFTS (see clause 5.3.1.2(2)

Number and Type of Lifts Required for Different Occupancies and Space for Electrical Installations

1. The number and type of lifts required depending on the capacity of lift, desired speed nature of operation is as given in table below:

Table: Number and types of lifts for non-residential Multi-storeyed Building

Note-1:

a) For all non-residential buildings, the traffic cleared in 50 minutes is considered adequate and is approved by Authority. As such for calculation the number of lifts required, the rate of the clearance of traffic in column 9 and 10 and the population may be taken into consideration.

b) In addition to total number of lifts required as above, provision of one lift of the same capacity may be considered to serve as stand-by.

Note-2: The population may be worked out on the basis of useful carpet area which the person occupies (excluding area of Verandah, Lobbies, Halls, Passages, Lavatory blocks, etc.)

Note-3: The population on ground and first floor may not be taken into consideration since these floors are not generally served by lifts.

Note-4: 0.75 metre per sec. Equivalent to 150 ft. per Min. 1.00 metre per sec. Equivalent to 200 ft. per Min. 1.5 metre per sec. Equivalent to 300 ft. per Min.

Note-5: The height of buildings for lift installation i.e. the travel on the lift presumed in the above statements are as below: 7 floors 21.0m 11 floors 33.0m 16 floors 48.0m 21 floors 64.0m

Table: Number and types of lifts for Residential Building

Table: Dimensions and required information for Lift Installation in Building

Location of electric sub-station in basement of multi-storied buildings:

(1) The electric sub-station should be provided in the approved/sanctioned covered area of the buildings not below the first basement level and should be on the periphery of the building with clear independent round the clock approach having proper ramp with slope.

The ramp should be designed in such a manner that in case of fire no smoke should enter the main buildings. The exit from basement electric sub-station shall have self-closing fire/smoke check doors of 2 hours. F.R. near entry to ramp. Additional exit shall be provided if travelled distance from the farthest corner of the ramp is more than 15m.

(2) The electric sub-station should be totally segregated from rest of the basement having 4 hours. F.R. wall and should have adequate internal lighting and ventilation. A perfect independent ventilation system of 30 air charges per hour linked with detection as well as automatic medium velocity water spray system for individual transformer shall be located outside the building at ground floor, fire control room shall be manned round the clock and shall also have and audio system in the basement as well as in the control room. No service such as water, sewer, air-conditioning, gas pipes or telegraphs services should pass through electric substation of the cable trench.

(3) The rising mains should be of metal bus bars. The floor of electric substation should be 2 ft above the rest of basement floor and designed suitably to carry 10 tons of transformer weight on wheels also having provision of proper cable trenches 0.6mX0.6m depth. Dummy floor of 0.6 m depth be provided to facilitate laying of cables inside the building connecting to equipment. Fire retarding cables should be provided and cable trenches be filed with said cables. R.C.C. pipes at suitably places as required will be provided for cable entries to the sub-station spaces with suitable water proofing arrangement. A provision of 12 ft. clear height below Beams should be made in the electric sub-station area along with adequate arrangement for fixing chain pulley block for a load of 15 tons. Provision of sumps shall be kept in the floor so that complete volume of transformer oil in the event of spill over could be accommodated. Sufficient arrangement to prevent spread of fire to oil pumps is made.

(4) Transformers room and sub-station room shall be provided with steel shutters of 8’ X 8’ with suitable grills. Sufficient arrangement for pumping the water out, in case of flooding should be made to minimize loss to switchgear and transformer.

(5) In view of experience of installation of exhaust chimneys in the multi-storied buildings at undesirable locations, proper provision in the form of vertical exhaust leading to above terrace level should be made for the substation.

(6) Electric sub-station space should be made available free of cost by promoters and should be free of seepage/leakage of water. There should be no combustible material kept in side or in the vicinity. Periodic inspection of electric sub-station shall be mandatory and violation of any bye-law will be dealt, sternly with penalty and immediate disconnection.

Other Requirements for Sub-station

1. The sub-station will preferably be located on the ground level failing which it can be in the basement floor in no case at higher level.

2. The entire space will be provided at one floor in continuation.

3. The minimum width of the sub-station space shall not be less than 6 m.

4. The areas given above in respect of the different categories of rooms hold good if they are provided with windows and independent access doors.

5. All the rooms should be provided with partition up to the Ceilings and shall have proper ventilation. Special care should be taken to ventilate the transformer rooms and where necessary, louvers at lower levels and exhaust fans at higher level shall be provided at suitable locations.

6. In order to prevent storm water entering the transformer and switch rooms through the soak pits, the floor level of the sub-station shall be at least 15 cm above the highest flood water level that may be anticipated in the locality.

Cable Trenches Shafts Etc.

(1) Suitable number of vertical shafts, rising mains, distribution boxes, etc. shall also be provided as per the requirements at suitable location. Cable trenches with suitable handy covers for entry of the cables up to the substation onwards up to the street adjoining other building shall also be provided as per the requirements.

These vertical shafts, rising mains, distribution boxes, cable trenches, etc. shall be so constructed as to be accessible only to authorized personnel. The rising mains and other installations in the vertical shafts, tap off boxes distribution boxes etc. required at each floor shall be provided, installed and maintained by the owner at their own cost. Adequate enclosed space shall also be provided at each floor for installation of equipment’s for distribution on respective floors such as distribution boxes, cut-out, and meter boxes and main switches.

(2) Location of Switch Room: In large installations other than where a substation is provided, a separate switch room shall be provided. This shall be located as closely possible to the electrical load centre and suitable ducts shall be laid with minimum number of bends form the point of entry of the supply to the position of the main switchgear. The switch room shall also be placed in such a position that rising ducts may readily be provided there from to the upper floors of the building in one straight vertical run. In larger building, more than one rising duct and horizontal ducts may also be required for running cables from the switch room to the foot of each rising main. Such cable ducts shall be reserved for the electrical services only, which may, however, include medium and low voltage installations, such as call bell systems. Telephone installation should be suitably segregated.

(3) Location and Requirement of Distribution Panels: The electrical gear distribution panels and other apparatus, which are required on such floor, may conveniently be mounted adjacent to the rising mains, and adequate space should be provided at each floor for this purpose.

(4) Location and Requirement of PBX/PABX Room: Information regarding provision and location of PBX/PABX room, telephone outlets and riser shall be ascertained form the relevant Authority.

Adequate space should be provided for installation of Sub-Distribution Board.

General

The maintenance of the built-up space for electric sub-station, distribution equipment, vertical shafts and enclosure at each floor shall be done by the owner. The standby arrangement for electricity supply up to and including the substation equipment and distribution pillars at the substation shall be provided compulsorily.