IBERDROLA ACCORDING N.I. 52.31.02 STRAIGHT CROSS-BARS AND SEMI CROSS-BARS

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Straight cross-bars and straight-type semi cross-bars are used to make the different fittings on lines up to 20 kV, although lines of up to 66 kV are not ruled out. They are supplied assembled with bolts and screws.

Designation	Separation between adjacent phases or prop shaft “a” (mm)
RC2-12,5-S	1.25
RC2-15-S	1.5
RC2-17,5-S	1.75
RC2-20-S	2
SC2-10-S	1
SC2-12,5-S	1.25
SC2-15-S	1.5
SC2-17,5-S	1.75
SC2-20-S	2
RC3-15-T	1.5
RC3-20T	2
SC3-15-T	1.5
SC3-20-T	2

Meaning of the initials making up the designation:
RC: straight-type cross-bar for lattice masts.
SC: straight-type semi cross-bar for lattice masts.
1, 2 or 3: indicates the vertical load to be supported by the cross-bar or semi cross-bar: 450 daN (1) and 650 daN (2) for the cross-bar or semi cross-bar type “S” or 650 (2) daN and 800 (3) daN for the cross-bar or semi cross-bar type “T”.
10/../20: corresponds to the length of height “a” expressed in dm.
S: Indicative of being a cross-bar or semi cross-bar without tie bar.
T: Indicative of being a cross-bar or semi cross-bar with tie bar.

These cross-bars are supplied with closing profile for anchoring chains (PCCA) or for suspension chains (PCCS).

STRESS BY PHASES

Crossarm	Semi-Crossarm	Load Case	Workloads + overload daN V	Workloads + overload daN L	Workloads + overload daN F	Safety Factor	Limit specified load Faces test daN V	Limit specified load Faces test daN L	Limit specified load Faces test daN F	Limit specified load Duration seconds
RC 1-S	SC 1-S	A	450	–	1500	1.5	675	–	2250	60
RC 1-S	SC 1-S	B	450	1500	–	1.5	675	2250	–	60
RC 2-S	SC 2-S	A	650	–	1500	1.5	975	–	2250	60
RC 2-S	SC 2-S	B	650	1500	–	1.5	975	2250	–	60
RC 2-T	SC 2-T	A	450	–	2000	1.5	675	–	3000	60
RC 2-T	SC 2-T	B	450	2000	–	1.5	675	3000	–	60
RC 3-T	SC 3-T	A	800	–	2000	1.5	1200	–	3000	60
RC 3-T	SC 3-T	B	800	2000	–	1.5	1200	3000	–	60