A rail joint bar, comprising: a first side and a second side; wherein the first side has a longitudinal axis and a first outer surface curved convexly or concavely along the longitudinal axis and wherein the first outer surface defines a rounded shape conforming to and fitting within a concavely or convexly curved channel of a side of a curved railroad rail joint, wherein the concavely or convexly curved channel is defined by a web, a head and a foot of the railroad rail joint; and wherein the second side has a second outer surface that has a flat surface following the same curvature of the first side.

A releasable rail coupling (1000) for releasably coupling a first rail 10A providing a first portion P1 of a miming surface RS for a wheel (120) and a second rail (10B) providing a second portion P2 of the miming surface RS is described. The rail coupling (1000) comprises a first part (1100) having a first end 1110 comprising a first male coupling member (1111) and a second end (1120) arranged for joining to the first rail (10A). The rail coupling (1000) comprises a second part (1200) having a first end (1210) comprising a corresponding first female coupling member (1212), arranged to receive the first male coupling member (1111) therein, and a second end (1220) arranged for joining to the second rail (10B). The rail coupling (1000) is arrangeable in a first configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are uncoupled. The rail coupling (1000) is arrangeable a second configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are coupled by receiving the first male coupling member (1111) in the first female coupling member (1212). The rail coupling (1000) provides a third portion P3 of the running surface RS in the second configuration. In this way, assembly and/or disassembly of the first rail (10A) (i.e. a first length of rail) and the second rail (10B) (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced.

A releasable rail coupling (1000) for releasably coupling a first rail 10A providing a first portion P1 of a miming surface RS for a wheel (120) and a second rail (10B) providing a second portion P2 of the miming surface RS is described. The rail coupling (1000) comprises a first part (1100) having a first end 1110 comprising a first male coupling member (1111) and a second end (1120) arranged for joining to the first rail (10A). The rail coupling (1000) comprises a second part (1200) having a first end (1210) comprising a corresponding first female coupling member (1212), arranged to receive the first male coupling member (1111) therein, and a second end (1220) arranged for joining to the second rail (10B). The rail coupling (1000) is arrangeable in a first configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are uncoupled. The rail coupling (1000) is arrangeable a second configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are coupled by receiving the first male coupling member (1111) in the first female coupling member (1212). The rail coupling (1000) provides a third portion P3 of the running surface RS in the second configuration. In this way, assembly and/or disassembly of the first rail (10A) (i.e. a first length of rail) and the second rail (10B) (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced.

A rail splice plate kit comprising first and third rap holes that align with first and third rail holes on a first rail to be spliced, second and fourth rsp holes that align with second and fourth rail holes on a second rail to be spliced, and the first, second, third, and fourth rsp holes are substantially circular. The rail splice plate kit comprises four rail bolts which have a cross section that is within 1/16 of an inch of a diameter of the first, second, third, and fourth rsp holes. The diameter of the first, second, third, and fourth rsp holes may be no more than 3/64 larger than the cross section of the rail bolts. The rail splice plate and the bolts are formed of steel. Adjacent rsp holes are spaced 5 inches from center from one another and a cross section of the rail splice plate is arcuate.

A rail splice plate kit comprising first and third rap holes that align with first and third rail holes on a first rail to be spliced, second and fourth rsp holes that align with second and fourth rail holes on a second rail to be spliced, and the first, second, third, and fourth rsp holes are substantially circular. The rail splice plate kit comprises four rail bolts which have a cross section that is within 1/16 of an inch of a diameter of the first, second, third, and fourth rsp holes. The diameter of the first, second, third, and fourth rsp holes may be no more than 3/64 larger than the cross section of the rail bolts. The rail splice plate and the bolts are formed of steel. Adjacent rsp holes are spaced 5 inches from center from one another and a cross section of the rail splice plate is arcuate.

A rail joint bar, comprising: a first side and a second side; wherein the first side has a longitudinal axis and a first outer surface curved convexly or concavely along the longitudinal axis and wherein the first outer surface defines a rounded shape conforming to and fitting within a concavely or convexly curved channel of a side of a curved railroad rail joint, wherein the concavely or convexly curved channel is defined by a web, a head and a foot of the railroad rail joint; and wherein the second side has a second outer surface that has a flat surface following the same curvature of the first side.