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.

DesignationSeparation between adjacent phases or prop shaft “a”
(mm)
RC1-10-S1
RC1-12,5-S1.25
RC1-15-S1.5
RC1-17,5-S1.75
RC1-20-S2
RC2-10-S1
RC2-12,5-S1.25
RC2-15-S1.5
RC2-17,5-S1.75
RC2-20-S2
SC1-10-S1
SC1-12,5-S1.25
SC1-15-S1.5
SC1-17,5-S1.75
SC1-20-S2
SC2-10-S1
SC2-12,5-S1.25
SC2-15-S1.5
SC2-17,5-S1.75
SC2-20-S2
RC2-15-T1.5
RC2-20-T2
RC3-15-T1.5
RC3-20T2
SC2-15-T1.5
SC2-20-T2
SC3-15-T1.5
SC3-20-T2

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
 
CrossarmSemi-CrossarmLoad CaseWorkloads + overload
daN
V
Workloads + overload
daN
L
Workloads + overload
daN
F
Safety FactorLimit 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-SSC 1-SA45015001.5675225060
RC 1-SSC 1-SB45015001.5675225060
RC 2-SSC 2-SA65015001.5975225060
RC 2-SSC 2-SB65015001.5975225060
RC 2-TSC 2-TA45020001.5675300060
RC 2-TSC 2-TB45020001.5675300060
RC 3-TSC 3-TA80020001.51200300060
RC 3-TSC 3-TB80020001.51200300060