Joist were typically planed smooth (wrought) and sometimes chamfered or beaded. Joists may join to their supporting beams in many ways: joists resting on top of the supporting beams are said to be "lodged"; dropped in using a butt cog joint (a type of lap joint), half-dovetail butt cog, or a half-dovetail lap joint. Joists may also be tenoned in during the raising with a soffit tenon or a tusk tenon (possibly with a housing). Joists can also be joined by being slipped into mortises after the beams are in place such as a chase mortise (pulley mortise), L-mortise, or "short
Mitre Line announced the construction of a viaduct for the Retiro–Tigre branch of Mitre Line. The viaduct would extend along the city of Buenos Aires, from Dorrego Avenue in Palermo to Congreso Avenue in Núñez. Works began in September 2017, and when the viaduct is finished, eight level crossings will be removed. Trains will run elevated for a total of 3,9 kilometers. The project also includes a total refurbishment of Lisandro de la Torre and Belgrano C stations. Current Mitre Line services as of February, 2015: Mitre Line The Mitre line is an Argentine broad gauge commuter rail service in Buenos Aires