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Stay wires & Guy Grips.
  DEFINITIONS.

The definitions given in the reference standards apply. The terms stay wire and stay strand have the same meaning in this specification.
 
REQUIREMENTS.

Operating Conditions.


The stay wire and preformed guy grip shall be suitable for continuous use outdoors in tropical areas at altitudes of up to 2000m above sea level,
humidities of up to 90%, average ambient temperature of +30ºC with a minimum of -1ºC and a maximum of +40ºC and heavy saline conditions
along the coast.


Stay Wires

Material


The base metal shall be steel made by the open-hearth, basic-oxygen or electric-furnace process and of such quality and purity that, when
drawn to the size of wire specified and coated with zinc, the finished strand and the individual wires shall be of uniform quality and have
the properties and characteristics as specified in this specification.

The galvanized steel wires used in the construction of the stay wire shall comply with the requirement of BS 443.

Construction

The stay wire shall be manufactured as per the requirement of BS 183.

The outer wires of all strands shall have a right-hand lay (Z).

All wires shall be stranded with uniform tension. Stranding shall sufficiently close to ensure no appreciable reduction in diameter when
stressed to 10% of the specified wire strength.

The wires shall be concentrically twisted with a uniform pitch of not less than 10 nor more than 18 times the specified nominal diameter
the strand.

Joints made in individual wires shall be accepted provided there is not more than one joint in any 45m section of the completed strand.

Joints made during stranding shall be protected against corrosion.

Standard Sizes

The standard sizes for the stay wires shall be as follows:-
STANDARD.
NEAREST EXISTING SIZE.
SIZE


7/4.00
19/3.55
7/2.00
4/4.00
GRADE


700
700
700
700
MINIMUM
BREAKING
LOAD
61.6 kN
131.6 kN
15.4 kN
35.2 kN
KPLC/
REA
CODE
189737
189739
189744
189748
SIZE
7/8 Stay
Wire
19/10 Stay
Wire
7/14 Stay

Wire
QUALITY


45 ton/in2
45 ton/in2
45 ton/in2
45 ton/in2
MINIMUM
BREAKING
LOAD
6430 kg
11180 kg
1610 kg
3680 kg
  Guy Grips.
The guy grips shall be suitable for use with BS183 Stay Strand (Stay Wire) of the following characteristics.Size of Stay Wire: 19/10 SWG (19/3.55/700 mm), right hand lay. Minimum failing load: 131 kN

The guy grips shall be manufactured from galvanized steel wire of such quality that when applied to the specified stay strand, they hold
full rated breaking strength of the stay strand.

The galvanized steel wires used in the construction of the guy grip shall comply with the requirement of BS 443.

The guy grips shall be heliformed to be quickly made and present a neat finished appearance. They shall have a long-term performance
commensurate with other fittings used in guying applications.

The guy grips shall be capable of being removed and re-applied to their original position on the stay strand up to three times for the
purpose of stay adjustment during line construction procedures.

Marking, Packing and Instructions
Stay Wire

The complete stay wire shall be rolled in a coil of 100m and packed in a manner as to protect it from damage in transportation and repeated
handling.

The completed coil shall be tagged. The following description shall be marked on the tag:

(a) Type of stay wire

(b) Standard of manufacture

(c) Length

(d) Manufacturer’s name

(e) Year of manufacture

Guy Grips

The guy grip shall be packed in a manner as to protect it from any damage in transportation and repeated handling.

The guy grip shall have a tag marked with the following information:

(a) Type of guy grip

(b) Length

(c) Manufacturer’s name

(d) Year of manufacture

Installation instructions and relevant data shall be submitted with the materials.

 
Redesigned & Developed By:
Brian - HC & S LTD