Volume-IF - JantERmantER

TITLE SPECIFICATION NO. PES-509-02A
LIGHTNING PROTECTION &EARTHING
OF CHIMNEY
(SUPPLY & INSTALLATION)
VOLUME
II B
SECTION
D
REV NO. 0 DATE 08.02.2002
SHEET 3 OF 4
1.0 GENERAL
1.1 This section includes the design, fabrica tion, supply, installation and testing of
Lightning Protection system for the Chim ney(s). The requirem ents of this specification
shall be complied with in relation to the requirements set out in Data Sheet-A & Section-
C.
1.2 The contractor’s scope, besides m aterial s upply shall include com plete installation of
Lightning Protection System , protective coating application, and testing of the system .
All m aterials, consum ables, erection equipm ent etc. as required for the com pletion of
installation and testing facilities shall be supplied.
2.0 CODES & STANDARDS
2.1 The latest revisions of the following codes & standards shall be applicable:
IS:2309 Code of practice for protection of bu ildings & allied structures against
lightning.
IS:3043 Code of Practice for earthing
IS:4759
Hot-dipped galvanised coating on structural steel
IS:2629
Recommended practice for Hot-dipped galvanising for Iron & Steel.
IS:2633
Methods of Testing Uniformity of Coating on zinc-coated Articles.
IS:1731
Dimensions for Steel flats for structural & General Engineering Purposes.
IS:1752
Electroplated Coatings of Cadmium on Iron & Steel
Indian Electricity Rules, 1956,
Indian Electricity Act, 1960.
IS:4990(Part-I) Criteria for Design of Reinforced concrete Chimney.
3.0 DESIGN REQUIREMENTS
3.1 Lightning Protection system for the chim ney shall consist of air-term ination network
comprising requisite num ber of vertical coppe r rods, 20m m in dia, projecting at least
1000mm above the top of the chim ney and th e flues, spaced uniform ly along the top
periphery of the outer shell of the Chim ney and that of the flues. A ring of 75x6m m GI
strip shall be laid along the top periphery of the flues and the Chim ney, form ing the