Appendices

Appendices

APPENDIX A        Maximum Demand and Diversity

APPENDIX B        Useful Tables Relating to Conductor Sizes

APPENDIX C        Completion Certificate Form (Electrical Works)

APPENDIX D        Relationship of Weighting Curves for Sound Levels

APPENDIX E        Recommended Optimum Reverberation Time for Assembly Buildings

APPENDIX F        STC Ratings of Walls and Floors

APPENDIX G        Air Traffic Noise Levels

APPENDIX H        Frequency Values and Noise Levels of Some Common Sources

APPENDIX I        Typical Noise Levels in Free-Flowing Road Traffic

APPENDIX J        Average Air-borne Sound Insulation of Common Constructions

APPENDIX K        Recommended Background Noise Criteria and NC Curves

APPENDIX L        Particulars of Lifts, Escalators and Moving Walks

APPENDIX M        Format for Particulars of Lifts, Escalators and Moving Walks

APPENDIX N        Application for Permit to Construct Water Supply and Distribution System       

APPENDIX P        Sizing of Cold Water Supply and Distribution Piping

APPENDIX Q        Completion Certificate (Water Supply Works)

APPENDIX R        Application for Permit to Construct Drainage and Sanitation System

APPENDIX S        One-hour Rainfall

APPENDIX T        Design Guideline of a Septic Tank

APPENDIX U        Completion Certificate (Drainage and Sanitation Works)

Appendix V        Work on the Gas Supply System

Appendix W        Documentation for the Piping Installation

Appendix A

Maximum Demand and Diversity

Some information on the determination of the maximum demand for an electrical installation are provided in this appendix. It also includes some notes on the application of allowances for diversity. It is impossible however, to specify the appropriate allowances for diversity for every type of installation  since determination of such allowances calls for special knowledge and experience. The figures shown in Table A1 are therefore, intended to act as guideline. The current demand of a final circuit is determined by summing the current demands of all points of utilization and equipment in the circuit. Typical values to be used for this summation are given in Table A2.  For blocks of residential dwellings, large hotels,  and industrial and large commercial premises, allowances are to be assigned by  a competent engineer.

The current demand of a circuit supplying a number of final circuits may be assessed by applying the allowances for diversity given in Table A1 to the total current demand of all the equipment supplied by that circuit. In the table, the allowances are appraised either as percentages of the current demand or, where followed by the letters f.l., as percentages of the rated full load current of the current using equipment. After the design currents for all the circuits have been determined, enabling the conductor sizes to be chosen, it is necessary to check that the limitation on voltage drop is met.

Table   A 1  

Allowances for Diversity

Purpose of final circuit	Type of Premises
fed from conductors or switchgear to which diversity applies	Individual household installations, including dwellings of a block	Small shops, stores, offices and business premises	Small hotels, boarding houses, guest houses, etc.
1.   Lighting	66% of total current demand	90% of total current demand	75% of total current demand
2.   Cooking appliances	10 amperes + 30% f.l. of connected cooking appli-ances in excess of 10 amperes + 5 amperes if socket outlet is incor-porated in unit.	100% f.l. of largest appliance + 80% f.l. of 2nd largest appliance + 60% f.l. of remaining appliances	100% f.l. of largest appliance + 80% f.l. of 2nd largest appliance + 60% f.l. of remaining appliances
3.  Motors (other than lift motors which are subject to special consideration)	______	100% f.l. of largest motor + 80% f.l. of  2nd largest  motor + 60% f.l. of remaining  motors	100% f.l. of largest motor + 50% f.l. of remaining motors.
4.  Water heater (ther-mostatically contro-lled)	No diversity allowable

Table  A 2

Current  Demand to be Assumed for Points of Utilization and Current using Equipment

Point of Utilization or Current-using Equipment	Current Demand to be Assumed
Socket outlets other than 5A socket outlets 5A socket outlets Lighting outlet House hold cooking appliance All other stationary equipment	Rated current At least 0.5A Current equivalent to the connected load, with a minimum of 100W per lamp holder The first 10A of the rated current plus 30% of the remainder of the rated current plus 5A if a socket outlet is incorporated in the control unit Standard rated current or nominal current.

Appendix B

        Useful Tables Relating  to Conductor Sizes

Table B 1

 Number of Single-core  Wire of Different Sizes for Various Sizes of Metal Conduits

Conductor Cross-sectional Area (mm2)	Conduit Diameter (mm)
	19	25.4	31.8	38	51	63.5
	Number of wires that can be drawn
1.5	5	10	14	-	-	-
2.5	5	8	12	-	-	-
4.0	3	6	10	-	-	-
6.0	2	5	8	-	-	-
10.0	-	3	5	6	-	-
16.0	-	-	3	6	-	-
25.0	-	-	2	4	6	7
35.0	-	-	-	3	5	6
50.0	-	-	-	-	4	5

Table B 2

Number of Single-core Wires  of Different Sizes for Various  Sizes of  PVC Conduits

Conductor Cross-sectional Area (mm2)	Conduit Diameter (mm)
	19	25	32	38	51
	Number of wires that can be drawn
1.5	6	10	14	-	-
2.5	5	10	14	-	-
4.0	3	6	10	14	-
6.0	2	5	8	11	-
10.0	-	4	7	9	-
16.0	-	2	4	5	12
25.0	-	-	2	2	6
35.0	-	-	2	2	5
50.0	-	-	-	2	3

Table B 3

Wire Gauges

Gauge  System		Diameter	Cross-sectional	Weight of	Weight of
			Area	Copper	Aluminium
AWG	SWG	(mm)	(mm2)	(kg/km)	(kg/km)
6/0	-	14.73	170.46	1515.4	460.4
5/0	-	13.11	134.92	1199.4	365.0
-	7/0	12.70	126.68	1126.2	342.1
-	6/0	11.79	109.09	969.8	294.6
4/0	-	11.68	107.22	953.2	289.4
-	5/0	10.97	94.56	840.7	255.4
3/0	-	10.41	85.16	757.2	229.6
-	4/0	10.16	81.70	720.7	219.6
-	3/0	9.449	70.12	623.4	189.4
2/0	-	9.271	67.51	600.1	182.1
-	2/0	8.839	61.36	545.5	165.7
0	-	8.255	53.52	475.8	144.4
-	0	8.230	53.19	472.9	143.6
-	1	7.620	45.60	405.4	123.1
1	-	7.341	42.22	376.2	114.5
-	2	7.010	38.60	343.1	104.2
2	-	6.553	33.94	299.8	90.80
-	3	6.401	32.18	286.1	86.89
-	4	5.893	27.27	242.5	73.63
3	-	5.817	26.57	236.2	72.01
-	5	5.385	22.77	202.5	61.51

(Continued to next page)

Table B 3 (Contd.)

Wire Gauges

Gauge  System		Diameter	Cross-sectional	Weight of	Weight of
			Area	Copper	Aluminium
AWG	SWG	(mm)	(mm2)	(kg/km)	(kg/km)
4	-	5.182	21.09	187.5	57.11
-	6	4.877	18.68	166.1	50.44
5	-	4.623	16.78	149.2	45.25
-	7	4.470	15.70	139.5	42.39
6	-	4.115	13.30	118.2	35.91
-	8	4.065	12.97	115.3	35.02
7	9	3.658	10.507	93.41	28.49
8	10	3.251	8.302	73.80	22.59
-	11	2.948	6.818	60.61	18.41
9	-	2.896	6.585	58.54	17.91
-	12	2.642	5.480	48.72	14.80
10	-	2.591	5.272	46.87	14.21
-	13	2.337	4.284	38.08	11.58
11	-	2.311	4.196	37.30	11.26
12	-	2.057	3.325	29.55	8.934
-	14	2.032	3.243	28.83	8.756
13	15	1.828	2.627	23.35	7.093
14	16	1.626	2.075	18.45	5.621
15	-	1.448	1.646	14.64	4.460
-	17	1.422	1.589	14.13	4.290
16	-	1.295	1.318	11.72	3.532
-	18	1.291	1.168	10.38	3.154
17	-	1.143	1.026	9.122	2.808
18	19	1.016	0.8107	7.207	2.223
19	20	0.9144	0.6567	5.838	1.773
20	21	0.8128	0.5189	4.613	1.401
21	-	0.7239	0.4156	3.695	1.111
-	22	0.7112	0.3973	3.532	1.073
22	-	0.6428	0.3243	2.883	0.8756
-	23	0.6096	0.2919	2.595	0.7881
23	-	0.5733	0.2588	2.301	0.6990
-	24	0.5588	0.2453	2.181	0.6620
24	-	0.5105	0.2047	1.820	0.5527
-	25	0.5086	0.2021	1.797	0.5473

Appendix C

Completion Certificate Form (Electrical Works)

I/we certify that the installation detailed below has been installed by me/us and tested and that to the best of my/our knowledge and belief, it complies with the requirements of Bangladesh National Building Code and the Electricity Act of Bangladesh (as modified up to 1987)

Electrical Installation at .

Voltage and system of supply

Particulars of Works :

a) Internal Electrical Installation

   No.  Total load  Type or system of wiring

   i)  Light point

   ii)  Fan point

   iii)  Plug point

   3-pin 5 A

   3-pin 15 A

 b)  Others  Description  hp/kW  Type of starting

   1)  Motors

   i)

   ii)

   iii)

   2)  Other plants

 c)  If the work involves installations of over head line and/or underground cable

   1)  i)  Type and description of over head line

   ii)  Total length and number of spans

   iii)  Number of street lights and its description

   2)  i)  Total length and size of underground cable

   ii)  Number of joints

   End joint

   Tee joint

   Straight through joint

 d)  Earthing

   i)  Description of earthing electrode

   ii)  Number of earth electrodes

   iii)  Size of main earth lead

Test Results :

 a)  Insulation Resistance

                i)        Insulation resistance of the whole system of conductors to earth _________________ mega                         ohms

   ii)  Insulation resistance between the phase conductor and neutral

                        Between phase R and neutral  _________________  mega ohms

                        Between phase Y and neutral  _________________  mega ohms

                        Between phase B and neutral  _________________  mega ohms

   iii)  Insulation resistance between the phase conductors in case of polyphase supply.

                        Between phase R  and phase  Y _________________  mega ohms

                        Between phase Y  and phase  B _________________  mega ohms

                        Between phase B  and phase  R _________________  mega ohms

 b)  Polarity test

   Polarity of nonlinked single pole branch switches

 c)  Earth continuity test

                Maximum resistance between any point in the earth continuity conductor including metal conduits and main earthing lead ______________ ohms

 d)  Earth electrode resistance

   Resistance of each earth electrode

                i)        ______________________        ohms

                ii)        ______________________        ohms

                iii)        ______________________        ohms

                iv)         ______________________        ohms

e) Lightning protective system

                Resistance of the whole of lightning protective system to earth before any bonding is effected with earth electrode and metal in/on the structure ________  ohms.

_____________________ _____________________

Signature of Supervisor Signature of Contractor

 Name and Address  Name and Address

Appendix D

Relationship of Weighting Curves for Sound Levels

The standardized weighting curves for sound level meters together with the more recent E and SI curves are shown in the figure below.

Appendix E

Recommended Optimum Reverberation Time for Assembly Buildings

The  recommended optimum reverberation times for various uses of Assembly buildings are given in the  figure below.

Appendix F

STC Ratings of Walls and Floors

STC ratings of some commonly used walls, floors and structural elements are given in the following Table.

Walls	STC
100 mm brick with 13 mm plaster both side	40
114 mm brick with 13 mm plaster both side	42
230 mm brick with 13 mm plaster both side	52
305 mm brick	54
305 mm brick wall, both side plaster with 50 mm cavity	54
460 mm brick wall, both side 13 mm plaster, 25 mm wood wall slab  and 152 mm cavity	62
610 mm stone wall, both side 13 mm plaster	56
150 mm concrete wall with 13 mm plaster both side	52
Floors	STC
100 mm concrete slab	44
125 mm concrete slab with 32 mm cork and plywood subfloor	48
150 mm concrete slab with 19 mm plaster on both side	47
150 mm concrete slab with cork pad, wood floor and sleeper  (total 235 mm thick)	53

Appendix G

Air Traffic Noise Levels

For traffic noise levels produced from the aircrafts, control measures shall  be initiated from the investigation of the following characteristic features of aircraft noise :

a)i) Noise characteristics of different aircraft vary  with different power conditions.

ii) Noise created by jet aircraft are different from those generated by propeller aircraft with piston engines.

iii) Jet noise originates from different parts of the engine, such as the jet, the compressor and the turbine.

iv) The typical roar of a flying jet is generated by the violent mixing of the hot exhaust gases with the surrounding air, particularly noticeable during take off and climb.

b) After take off the noise level on the ground shall not exceed certain maximum values, for each direction of each runway. These noise levels are higher during the day than at night.

c)        An angle of 3o or less with the horizontal should be adopted for landing.

d) Very long corridor shall be left free of buildings for descending the aircraft before they reach the runway threshold. Airports with runways which continue over water (lake or sea) can follow the noise control requirements much more easily and with added safety.

 Approximate noise levels due to various types of aircrafts, measured on ground (when the aircraft fly overhead at a height of 450 m) shows that boeing 707 records a maximum noise level of 111 PNdB, followed by Boeing 737 (107 PNdB), Boeing 747 (103 PNdB) and Airbus A 300 (101 PNdB).

 The flyover noise level for Concorde SST at 450 m with take off thrust is recorded at 114 PNdB, the highest noise level among the commercial aircrafts.

Appendix H

Frequency Values and Noise Levels of Some Common Sources

High frequency values have short wavelengths, and are heard as notes of high pitch. Conversely, low frequency sounds have a long wavelength, and are heard as notes of low pitch.

A healthy young person is capable of hearing sound from about 20 to 20,000 Hz. Prolonged exposure to intense sound can also cause permanent hearing damage. Short term exposure can cause temporarily losses.

 Some typical frequencies are mentioned below (in round numbers):

Male voice, vowel sounds	100 Hz
Male voice, sibilants	3,000 Hz
Bass singer, bottom note	100 Hz
Piano, bottom note	25 Hz
Piano, middle C	260 Hz
Piano, top note	4,200 Hz
Piccolo, top note	4,600 Hz
Orchestral range	45-4,500 Hz
Audible range	20-20,000 Hz

 The following are examples of familiar sounds expressed in dB :

Description	Subjective Evaluation	Decibels (dB)
Near jet engine		140
Threshold of pain	Deafening	130
Threshold of feeling hard rock band		120
Accelerating motorcycle at a few metre away (Note: 15 m from motorcycle equals noise at about 600 m from a 4-engine aircraft)	Very loud	110
Full orchestra, loud passage		95
Noisy urban street, noisy factory	Loud	90
School cafeteria		80
Loud speech, 1 m distant; stenographic room	Moderate	70
Near freeway auto traffic		60
Conversational speech, 1 m distant; average office		50
Attentive theatre audience, total sound. Soft radio music in apartment.	Faint	40
Faint whisper, 1 m distant; average residence without stereo playing		30
Average whisper		20
Rustle of one program, 8 m distant	Very faint	15
Rustle of leaves in wind; human breathing		10
Threshold of audibility		0

Appendix I

Typical Noise Levels in Free-Flowing Road Traffic

Typical noise levels in free-flowing road traffic are given in the following table.

No. of Vehicles (per 18 hour day)	Speed	L10, 30 m from Road Edge dBA
5000 (10 per cent heavy vehicles)	50 km/h	65
10,000 (20 per cent heavy vehicles)	60 km/h	70
10,000 (40 per cent heavy vehicles)	80 km/h	75
20,000 (40 per cent heavy vehicles)	80 km/h	77

                Note : The values are applicable to free-flowing traffic without honking.

Appendix J

Average Airborne Sound Insulation of  Common Constructions

Table J 1 below indicates the airborne sound insulation, averaged over the frequency range 100 to 3150 Hz, of a number of common types of constructions. These single figure values must be taken only as a guide  because insulation effectiveness depends on how  the insulation varies with frequency and because differences in building construction affect the values actually obtained. It must  also  be remembered that the insulation achieved in practice depends not  only on the insulation of the particular dividing element but also on its area in relation to the sound absorption in the rooms, and on indirect transmission. No specific allowance  can be made for indirect transmission. However for elements having an insulation of 40 dB or below it will have little effect. In Table J 1 the figures above 40 dB allow for the amount of indirect transmission likely to be present when the structures are used in a more or less traditional manner.

As to the effects of area and absorption, the values given  have  been chosen to represent as nearly as possible  the achieved insulation between two normally furnished rooms of average proportions when the whole area of the wall or floor is of the specified construction. As a result  of these considerations, and owing to variations in detailing and quality of workmanship, it is important to bear in mind that the figures in Table J 1 are subject  to wide tolerance and must  be  treated as estimates.

Table J 1

Average Airborne Sound Insulation of  Windows, Walls, Floors etc.

 Windows

Open window 5-10 dB

3 or 4 mm glass, not well sealed 15-20

3 or 4 mm glass, well sealed 23

6 mm glass, well sealed 27

4 mm glass --200 mm gap --4 mm glass, but each leaf partially opened  

(up to 100 mm opening), with openings staggered 1.5 m apart 27

6 mm glass --12 mm gap --6 mm glass well sealed 28

12 mm glass, well sealed 31

6 mm glass --150 mm gap --4 mm glass well sealed, lined reveals 35

12 mm glass laminated, well sealed 36

4 mm glass --200 mm gap --4 mm glass, but not well sealed 36

10 mm glass --80 mm gap --6 mm glass well sealed, lined reveals 37

4 mm glass --200 mm gap --4 mm glass well sealed, lined reveals 39

10 mm glass ---200 mm gap --6 mm glass well sealed, line reveals 44

Masonry walls

Lightweight block work, not sealed < 35 dB

63 mm hollow clay block plastered on each side to  12 mm 35

        57 mm lightweight (100 kg/m2) block work, plastered both sides to 12 mm         39

50 mm precast concrete units, well grouted joints 40

        200 mm lightweight concrete precast slabs (122 kg/m2) with well grouted joints        40

100 mm solid brickwork, unplastered 42

100 mm solid brickwork, plastered 45

110 mm dense concrete, well sealed 45

150 mm dense concrete, well sealed 47

230 mm solid brick, unplastered 48

250 mm no fines concrete (1:10) plastered both sides to 12 mm 49

        Block work (110 kg/m2) 75 mm airspace -block work (110/kg/m2)        49

200 mm dense concrete blocks with cement-lime mortar 50

plastered both sides to 12 mm

230 mm solid brick work pestered or with dry  lining of

12 mm plaster board on plaster dabs 50

250 mm cavity construction, i.e. 110 mm brick-cavity- 5 mm block + 12 mm

plaster, butterfly wire ties 50

280 mm cavity brick work, butterfly wire ties, plastered one side to 12 mm 52

340 mm brick work, plastered both sides o 12 mm 53

450 mm brick or stone well pointed or plastered 55

Note : These estimates refer to insulation of walls between rooms. For insulation

between a room and a noise in the open air the overall insulation should be

   reduced by 5 dB.

(Continued to next page)

Table J 1 (Contd.)

Average Airborne Sound Insulation of  Windows, Walls, Floors etc.

Floors

21 mm t-and g-boards or 19 mm chipboard on floor joists, 9 mm plaster

board + skim coat below 35 dB

        110 mm concrete + screed (≤ 220 kg/m2)        42

21 mm t-and g-boards or 19 mm chipboard on floor joists, lath and

                plaster (20 mm) below with 50 mm layer of sand pugging        45-46

125 mm reinforced concrete + 50 mm screed 45-46

200 mm reinforced concrete + 50 mm screed 47-48

125 mm reinforced concrete + timber raft (i.e. 21 mm t-and-g boards or

19 mm chipboard) on glass- or mineral-fibre quilt 47-48

Precast concrete units (50 mm) + 30 mm finishing screed on deep truss

with well sealed 9 mm insulation board below 47-48

125 mm reinforced concrete + 40-50 mm concrete screed on glass or

mineral-fibre quilt 49-50

300 mm reinforced concrete + 50 mm screed 49-50

Floated timber raft (21 mm t-and g-boards or 19 mm chipboard) on glass 49-50

or mineral-fibre quilt on joists +

50 mm sand directly on ceiling of plaster on metal lath (20 mm) 49-50

150 mm reinforced concrete + 100 mm floated raft on specialist mounts,

free from 'bridging' 55

As above, with walls built near the edge of the floor to limit flanking transmission 60+

Dry partitions

21 mm t-and g-boarding, tightly clamped 20 dB

9 mm insulation board each side of 75 x 50 mm studs 23

12 mm plaster board + skim coat on timber frame 25

12 mm plaster board both sides of honeycomb core --63 mm total thickness 28

6 mm ply/hard board on 50 mm timber studs, mineral-fibre quilt in cavity 30

12 mm plaster board each side of 50 mm timber studs 30

1 mm steel panels spaced apart by 50 mm with mineral-fibre quilt fill 30

12 mm plaster board each side of 50 mm metal studs 33

50 mm wood-wool plastered both sides to 12 mm 35

12 mm plaster board each side of 50 mm timber studs with absorbent

quilt in cavity 37

As above, but with metal studs 39

2 x 12 mm plaster board each side of 50 mm timber studs with absorbent

quilt in cavity 41

1 mm steel panels backed with 9 mm plasterboard, with absorbent quilt in cavity 41

2 x 12 mm plaster board each side of 75 mm metal studs with absorbent

quilt in cavity 45

3 layers 12 mm plaster board on timber frame each side of

        225 mm air gap, frames separated and area of supported panels 15% glass

or mineral-fibre quilt hung in cavity 49

        Doors

Panel/hollow core door well fitted, no seals 15 dB

As above with good seals and close cut threshold 20

Solid core door well fitted, no seals 15

        As above with good seals and threshold  strip seal or close cut to carpet        25

60 mm + solid core door with carefully detailed seals, including threshold seal 30

                Note : Above 30 dB, specialist doors are needed.

Room to room insulation via suspended ceiling void

(Assuming 600 mm deep void, below concrete soffit, no undue obstructions

such as large ducts, downstand beams)

> 10% perforated metal pan ceiling with absorbent lay-in backing 15-20 dB

        19 mm mineral-fibre ceiling tile (6 kg/m2) in lay-in or concealed fix grid        25-30

Solid metal pan ceiling (0-6 mm) about 30

+ absorbent quilt overlay about 35

Perforated metal pan + 9 mm plasterboard backing 35-40

Appendix  K

Recommended  Background Noise Criteria and NC Curves

 The NC levels to specify the desirable lowest limits are given in Table K 1 and Fig K 1.

Table  K 1

Recommended Background Noise Criteria for Rooms

        Type of Room        NC Number

Concert hall 15-20

Radio or recording studio 15-20

Opera house 20

Theatre 20-25

Music room 20-25

Television studio 20-25

Executive office 20-30

Classroom or lecture hall 25

Cinema studio 25

Conference room 25-30

Church 25-30

Courtroom 25-30

Assembly hall or school auditorium 25-35

Home (sleeping areas) 25-35

Hotel or motel 25-35

Motion picture/Cinema  hall 30

Hospital 30

Semiprivate office 30-35

Library 30-35

Business office 35-45

Restaurant 35-50

Drafting room 40-45

Gymnasium 45-50

Typing or accounting office 45-60

Coliseum 50

Fig K1

Appendix L

Particulars of Lifts, Escalators and Moving Walks

 LIFT

a) Number of lifts and capacity of each lift;

b) Layout of lift well with sizes;

c) Particulars of lift well enclosures;

d) Size, position, number and type of landing doors;

e) Number of floors served by the lift;

f) Height between floor levels;

g) Provision of ventilation of lift well;

h) Total headroom clearance;

i) Location of machine room (above or below lift well), height of  machine room;

j) Provision of access to machine room;

k) Provision of ventilation and, if possible, natural lighting of machine room;

l) Depth of lift pit;

m) Size and position of supporting steel work at roof levels;

n) Size and position of any  footings or grillage foundations, if these are adjacent to lift pit; and

o) In the case of passenger lifts, whether the lift cage is required to carry heavy household luggage, such as refrigerator, steel almirah, etc.

ESCALATOR

a) Number of escalators and capacity of each escalator;

b) Layout of escalators with dimensions of floor punches; and

c) Height between floors.

MOVING WALK

a) Number of moving walks and capacity of each moving walk;

b) Layout of moving walks with dimensions; and

c) Length and width of each unit.

Appendix M

Format for Particulars of Lifts, Escalators and Moving Walks

        Lifts

a) Use: Passenger/Goods/Services/Hospital

b) Number of lifts required:

c) Capacity per lift :   Number of   passengers ________________ kg

d) Rated Speed: _______________ m/s

e) Travel  height : ______________  m

f) Size and type of car doors :  

g) Size and type of landing doors :

h) Size(s)  and location(s) of lift well(s) :  

i) Number  of doors :

j) Method of control(s)  :

k) Location of machine room :  

l) Position of counter  weight :

m) Size of car platform  :  

n) Construction, design and finish of car bodywork :

o) Construction, design and finish of car platform :

p) Particulars of  ventilation of the car :

q) Particulars of control  buttons in car :

r) Particulars of position indicators in car  :

s) Particulars of  call buttons in landing :

t) Particulars of car position indicators in landings :

u) Electric supply :

Power : __________  volts, ac/dc, ________ phase, ______ Hz/wire system ________

Lighting :  _________ Volts, ac/dc, ________ Hz/sec,

v) Additional requirements, if any :

ESCALATOR

a) Number of escalators required :

b) Capacity of each escalator (No. of people /hr) :

c) Rated speed ____________________  m/s

d) Travel height  ___________________  m, Travel length _____________  m

e) Width of escalator _______________  m

f) Construction, design and finish of balustrade :

g) Details of steps :

h) Materials of landing plate :

i) Electric supply  :

Power : ____________________________  volts, ac/dc,  ____________________ phase

___________________________________  Hz/wire system _______________________

j) Additional requirements, if any  : _

MOVING WALK

a) Number of moving walks required :

b) Capacity of each moving walk  (No. of people/hr)  :

c) Rated speed ____________________ m/s

d) Inclination ______________________ degrees

e) Width of moving walk ____________ m

f) Construction, design and finish of balustrade:

g) Material of landing plate :

h) Electric supply  :

Power : ____________________________  volts, ac/dc,  _____________________  phase

___________________________________ Hz/wire system

i) Additional requirements, if any :

Appendix  N

        Application for Permit to Construct Water Supply and Distribution System

1.Building Location :

2.Occupancy Classification:

3.Number of Storeys :  

4.Height of the Building :  

5.This application is accompanied by all required plans, drawing and design calculations (if required) in accordance with Sec 6.3.2 and 6.3.3 of Bangladesh National  Building Code.

______________________________ _______________________________

Signature of the licensed plumber Signature of the Owner or his/her designated person/agent

 Name and Address :  Name and Address :

Appendix  P

 Sizing of Cold Water Supply and Distribution Piping

The water distribution within the building may be an upfeed or downfeed system. The design principles are the same for both the systems. The principal difference in the calculation procedure is that in the upfeed system the difference in elevation between the fixtures and the water supply main exerts the pressure that supplies water into the fixtures, but in the downfeed system the difference in elevation between the fixtures and the roof storage tank provides the pressure to overcome the pipe friction. The following are the recommended pipe sizing procedures:

P 1 The sketch of the main lines, risers and branches serving different fixtures will have to be drawn.

P 2 Determine the number and types of fixture that will be required on the basis of the Table 8.7.1 in Chapter 7.

P 3 The demand weight of different fixture units may be computed  in terms of water supply fixture unit (wsfu) in accordance with Table P 1.

P 4 The peak demand load (or maximum probable flow) in litre per minute may be estimated with the data obtained in P 3 using Fig P 1 or on the basis of the number of occupants according to their occupancy classification specified in Table 8.6.1.

P 5 The equivalent length of the main lines, risers and branches will be determined. The equivalent length of different fittings may be estimated on the basis of the data presented in the Table P 2 and Fig P 2 or from manufacturer's specification. The total equivalent length is the sum of the equivalent lengths of all pipes and fittings.

P 6 The pressure loss through water meter may be determined on the basis of their operating characteristics as shown in  Fig P 3 (Disk type water meter). The data for other types of water meter may be obtained from the manufacturer.

P 7 The minimum pressure required at different fixtures to produce adequate flow may be estimated on the basis of the type of fixtures or minimum size of supply pipe in accordance with Table 8.6.4.

P 8 The average pressure drop in kPa per metre of equivalent pipe length may be computed as follows:

Next 'div' was a 'text:p'. Next 'span' is a draw:frame.

        where        Fp         =         Average available pressure loss (kPa) per metre of equivalent length of pipe

        P           =         Pressure (kPa) in the water main or zero for over head gravity storage tank.

        H         =        Height (m) of the highest fixture above the water main or difference (m) in elevation between storage tank and the fixture under consideration.

        f          =        Pressure loss (kPa) through water meter or such other fittings plus pressure (kPa) required to produce adequate flow through the  most remote fixture in upfeed system or the fixture under consideration in downfeed system.

        L          =        Equivalent pipe length (m)

*  + sign is for downfeed system and - sign is for upfeed system

P 9        The pipe size may be estimated from Fig  P 4 to P 7 for different types of piping materials on the basis of the expected rate of flow determined in P 4 and the average pressure available for friction loss (Fp) in P 7.

Table  P 1

Water Supply Fixture Unit (wsfu) Values for Various Plumbing Fixtures

Fixture or group	Supply Control	wsfu
		Cold	Hot	Total
Bath group	Flush tank	4.5	3	6
Bath group	Flush valve	6	3	8
Bathtub	Faucet	1.5	1.5	2
Bidet	Faucet	1.5	1.5	2
Combination	Faucet	2	2	3
Kitchen sink	Faucet	1.5	1.5	2
Laundry tray	Faucet	2	2	3
Laundry	Faucet	1.5	1.5	2
Pedestal urinal	Flush valve	10	-	10
Restaurant sink	Faucet	3	3	4
Service sink	Faucet	1.5	1.5	2
Shower head	Mixing Valve	3	3	4
Stall or wall urinal	Flush tank	3	-	3
Stall or wall urinal	Flush valve	5	-	5
Water closet	Flush tank	5	-	5
Water closet	Flush valve	10	-	10
*  Fixture with both cold and hot water supplies, the weight for maximum separate demands may be considered 75% of total  wsfu.

Table  P 2

Equivalent Length of Pipe for Friction Loss in Valves and Fittings

Valves or Fittings	Equivalent Length (m)  of Pipes Against Diameter (mm) of Fittings
	10	13	19	25	32	38	50	63	75	88	100	125	150
Angle Valve	1.22	2.44	3.66	4.57	5.49	6.71	8.53	10.36	12.19	15.24	16.76	21.34	24.38
Gate Valve	0.06	0.12	0.15	0.18	0.24	0.30	0.40	0.49	0.61	0.73	0.82	1.01	1.22
Globe Valve	2.44	4.57	6.10	7.62	10.67	13.72	16.76	19.81	24.38	30.48	38.10	42.67	50.29
90o Standard Elbow	0.30	0.61	0.76	0.91	1.22	1.52	2.13	2.44	3.05	3.66	4.26	5.18	6.10
45o Standard Elbow	0.18	0.37	0.46	0.55	0.73	0.91	1.22	1.52	1.83	2.13	2.44	3.05	3.66
90o Side Tee Coupling	0.46	0.91	1.22	1.52	1.83	2.13	3.05	3.66	4.57	5.49	6.40	7.62	9.14
Straight Run of Tee	0.09	0.18	0.24	0.27	0.37	0.46	0.61	0.76	0.91	1.10	1.22	1.52	1.83

Fig P 1

Fig P 2

Fig P 3

Fig P 4

Fig P 5

Fig P 6

Fig P 7

Appendix Q

Completion Certificate (Water Supply Works)

Ref. No. of the Authority's permit : ___________________________Date :  

This is to certify that I/We have completed the water supply and distribution system of the building and the premises at :  

Detail description of the work  :

This may be inspected, tested and approved.

______________________________

Signature of the licensed plumber

Name and Address :

The Authority's Certificate

Certified that the above water supply and distribution system has been completed in accordance with Chapter 6 of Part 8 of the Bangladesh National Building Code. The water supply connection from water main (if any) to the service pipe will be made on ____________________ .

____________________________________________________

Signature of the Building Official or his authorized deputy

Seal

Appendix R

Application for Permit to Construct Drainage and Sanitation System

1.Occupancy  classification  :  

2.Number of storeys :    

3.Location :    

4. This application is accompanied by all required plans, drawings (showing details of materials, sizes, gradient and location of pipes and location of fixtures)  and other details as specified in Sec 7.4.2, 7.4.3, 7.4.4 and 7.9.10 of Part 8  of Bangladesh National Building Code.

_____________________________________ ___________________________________

Signature of the licensed plumber Signature of the owner or his/her appointed person

 Name and Address:    Name and Address:

Appendix S

One-hour Rainfall

One hour rainfall values for a 25-year return period for various locations in Bangladesh may be taken from Fig S 1. The figure shows different regions of equal rainfall intensity as well as isohyets at 5 mm intervals.

Rainfall for a particular location shall be obtained as follows :

a) When the location lies within any region (shown shaded in the map), the value marked for that region shall be taken.

b) For a location lying on any isohyet in this map, the value of that isohyet shall be taken.

c) For a location lying outside the positions (a) and (b) above, linear interpolation shall be made between the adjacent isohyets to obtain the required rainfall value.

Fig S 1

Appendix  T

Design Guideline of a Septic Tank

The  volume of a septic tank may be computed using the following equation :

V = PQt + PSy

where

V        =        Volume of the septic tank (litre)

P        =        Number of persons served

Q        =        Flow, litre/capita/day (lpcd)

(The flow may be computed considering waste water flow 60% to 70% of the water consumption or on the basis of the plumbing fixtures discharging simultaneously into the septic tank, Sec 7.9.11.7. In absence  of these data the waste water flow for the Occupancy groups A, C and D may be considered 120 lpcd for cities, 50 lpcd for district town and 20 lpcd for thanas and rural areas. For other Occupancy groups a waste water flow of 10 lpcd may be considered.)

t        =        Liquid retention time, day

(minimum 1 day Sec 7.9.11.12)

S        =        Volume required for sludge and scum (0.04 m3/capita/year, Sec 7.9.11.11)

y        =        Desludging frequency, year

(Minimum 1 year, Sec 7.9.11.13).

If computed volume is less than 2000 litres then minimum volume of the septic tank shall be 2000 litre (Sec 7.9.11.8).

Appendix U

Completion Certificate (Drainage and Sanitation Works)

Ref. No. of the Authority's permit : _______________________________ _________ Date :

This is to certify that I/We have completed the drainage and sanitation system for the building and the premises at :

Detailed description of the work :

This may be inspected, tested and approved.

________________________________

Signature of the plumber

Name and Address :

The Authority's Certificate

This is to certify that the above drainage and sanitation system has been completed  in accordance with  Chapter 7 of Part 8 of the Bangladesh National Building  Code. The drainage connection to the main sewer (if any)  will be made on ____________________ .

___________________________________

Signature of the Building Official or his

authorized deputy

Seal

Appendix V

Work on the Gas Supply System

This appendix applies only to work on gas supply systems ahead of the outlet of the meter set assembly, or of the service regulator when there is no meter.

Serving Gas Supplier's Main

No person, unless in the employ of or authorized by the gas supply company shall  open or make connections with gas main.

Serving Gas Piping

No person, unless in the employ of or authorized by the gas supply company, shall repair, alter, open or make  connections to the services gas piping or do any other work on the parts of the gas supply system up to the meter set assembly or the service regulator when there is no meter.

Meter or Service Regulator When a Meter is Not Provided

No person, unless in the employ of or authorized by the gas supply company, shall disconnect the inlet of the gas meter or service regulator when there is no meter, nor move such meter or regulator. A gas  fitter may disconnect the outlet of such a meter or regulator from the house piping only when necessary. He shall make the joint at the meter or service regulator outlet when there is no meter, carefully replacing all insulating fittings or insulating  parts of such fittings, and shall leave the gas turned off at the meter or regulator unless the gas supply company's rules require or allow deviation from this procedure.

Notify Gas Supply  Company of any Repairs Needed

In case any work done by a gas  fitter reveals the need for repairs or alterations on any part of the gas supply  system, the gas supply company shall be notified promptly of this fact.

Notify Gas Supply Company of any Leakage

If gas  is leaking from any part of the gas supply system, a gas fitter or plumber not in the employ of the gas supply company may make necessary repairs and shall promptly notify the gas supply company.

Appendix W

Documentation for the Piping Installation

The gas supply company requires the following to be fulfilled by the consumer(s) for having gas supply from its distribution piping system:

a) Application for gas connection in prescribed from along with the approved plan of the building where the gas  is to be used. If the building is not approved by the Authority its plan is to be prepared by an approved contractor of the gas supply company.

b) An approved contractor of the gas supply company shall prepare the plan of the gas piping system for the building. The plan is to include plan and elevation of the proposed piping system. The plan so prepared shall be submitted to the gas supply company.

c) Installation of the piping system as approved by the gas supply company shall be carried out by an approved contractor of the gas supply company.

d) Completion report of the installation of the piping system (using the approved drawing) along with the pressure and lead tests by the approved contractor shall be submitted to the gas supply company. The pressure test is to be witnessed by the approved official of the gas supply company.

e) Completion report mentioned in (d) above is to include the papers related to the permission from the Authority for digging/cutting the road for taking the connection from the main supply line lying  under the road, if  needed.

f) The legal owner of the building shall sign an agreement with the gas supply company using the prescribed agreement document of the gas supply company prior to having the gas supplied to his premises.