31 JULY THE NEW ZEALAND GAZETTE 3197

Reinforced 35
Unreinforced (Humatic) 30
Plastic:
Buried pipes to be bedded in and surrounded with suitable granular material
and buried at sufficient depth to give adequate surface protection against loading:
PVC underground drain to NZS 7649 25
PVC Waste and Ventilating to NZS 7641 25
PVC Soil and Ventilating to NZS 7642 25
High Density polythene 20
Steel:
Suitably protected internally and externally against corrosion.
Arc butt welded to NZS 2226P 35
Pipes:
(Water Supply) non-aggressive water and soil conditions.
Asbestos Cement:
Pressure pipes to NZS 285 35
Cast Iron. spun to NZS 628 35
Plastic:
Buried plastic pipes to be bedded in and surrounded with suitable granular material
and at sufficient depth to give adequate protection against surface loading.
PVC cold water supply to NZS 7648 and installed to NZS 7643 35
Polythene for cold water services to NZS 1338 25
High density polythene 25
Steel:
Suitably protected internally and externally against corrosion.
Arc butt welded to NZS 2226P 35
Galvanised steel tubing 25
Copper 35
Fire hydrants As for pipe in which installed
Valves (metallic) As for pipe in which installed
Dams 35
Reservoirs:
Reinforced or prestressed concrete 35
Lined excavation with synthetic rubber, rubber lining and roof 10
Timber Stave 15
Steel tanks and water towers 25
Meters—all sizes 15
Structures:
Reinforced concrete 35
Steel (including pressure vessels) 25
Brick and concrete masonry 35
Timber (Softwoods, e.g. Pinus and Indigenous Timbers) 35
Exposed to Marine Conditions 15
Treated, used Externally and Painted 25
Treated, used Internally Painted or Unpainted 30
Timber (Imported Hardwoods) 30
Swimming baths: reinforced concrete construction in accordance with NZS 4441 35
Treatment equipment for water supply and swimming pools 15
Pumping plant, motors and controls 15
Structures:
Reinforced concrete (to NZS 1900, Chap 9.3 and adequate cover over steel) 35
In contact with sewage sludge or gas 30
Masonry 35
Mechanical and Electrical Equipment:
For sewage treatment plants and pumping stations 15
Plastic media for trickling filters 10
Wells:
Bored and lined 30
Dug, brick or concrete lined 35
Roading:
Road paving (Bituminous) 20
Road paving (concrete) 35
Culverts (concrete) 35
Culverts (wood stave, timber treated sapwood) 25
Bridges (reinforced concrete) 35
Bridges (steel) 25
Bridges (timber hardwood) 25
Electrical Undertakings:
Pipelines 30
Generating Plant 25
Main Transmission Lines (Ironbark, Concrete or Galvanised Steel Poles) 25

Primary Distribution Lines 25
Secondary Distribution Lines 20
Main Substation—Indoor 20
Main Substation—Outdoor 15
Distribution Substations—Indoor 20
Distribution Substations—Outdoor 15
Public Lighting 15
Special Stand-by Plant 10
Meters, Instruments, Furniture and Equipment 20
Transformers 15
Tubines—Steam 25
Tubines—Water 30

SCHEDULE II

Maximum Term (Years) Annual Sinking Fund Contribution

3 29.21
4 20.47
5 15.28
6 11.86
7 9.46
8 7.70
9 6.35
10 5.30
11 4.46
12 3.78
13 3.22
14 2.76
15 2.38
16 2.05
17 1.77
18 1.54
19 1.34
20 1.17
21 1.02
22 0.89
23 0.78
24 0.68
25 0.59
26 0.52
27 0.46
28 0.40
29 0.35
30 0.31

Dated at Wellington this 25th day of July 1986.

G. C. SCOTT, Chairman.
Local Authorities Loans Board.

The Standards Act 1965—Standard Specification Revoked

Pursuant to section 23 of the Standards Act 1965, the Standards Council, on 30 May 1986, revoked the under-mentioned standard specification.

Number and Title of Specification

NZS 4452:1974 Construction of underground pipe sewers and drains. (Cancelled and replaced by the new edition NZS 4452:1986).

Dated at Wellington this 25th day of July 1986.

DENYS R. M. PINFOLD,
Director, Standards Association of New Zealand.

The Standards Act 1965—Specifications Declared to be Standard Specifications

Pursuant to section 23 of the Standards Act 1965, the Standards Council, on 30 May 1980, declared the under-mentioned specifications to be standard specifications.

Number and Title of Specification Price of Copy (Post free)

NZS 4452:1986 Code of practice for the construction of underground pipe sewers and drains. (New edition incorporating Amendments No. 1 and No. 2) $22.00