Dom Luís I Bridge (Ponte de Dom Luís I) Portugal - A bridge that Handyside didn't win the contract for.

I have lots of interesting articles on Handyside I've collected over 19 years. This one is about a tender Handyside submitted for the design of the Luis Bridge (River Douro), Porto in Portugal. Ultimately they didnt win the contract for this bridge, it was awarded to Belgian Société de Willebroek. But below is their tender for the design. 

A competition was initiated in November 1880, in order to construct a double-deck metal bridge, which included projects by Compagnie de Fives-Lille, Cail & C., Schneider & Co., Gustave Eiffel, Lecoq & Co., Société de Braine-le-Comte, Société des Batignolles (which submitted two ideas), Andrew Handyside & Co., Société de Construction de Willebroek (also two projects), and John Dixon.

Here is the text taken from the tender by Andrew Handyside (see image above) : 

The fourth design was submitted by Messrs. Handyside and Co., of Derby. It was designed by Mr. M. Am Ende, M.I.C.E., Westminster, and, as shown by the paper recently read by him at the Institution of Civil Engineers, partakes in principle of his designs carried out by Messrs. A. Handyside and Co. on the Costa Rica Railway, in which, however, the intrados, or lower members of the arch, is polygonal instead of parabolic. 

The design is made with a view to erection, in the process of which the arch would be built in two parts and joined at the centre. The arch girders are spread towards their springing to gain lateral stability. The roadway is suspended by eleven bars, and the bracing consists of vertical and angular members. The estimated cost is £81,200

On 21 November 1881, the public work was awarded to the Belgian Société de Willebroek, from Brussels, for 402 contos. It was to be administered by Théophile Seyrig, the former partner of Gustave Eiffel and author of the project. It opened on 30th October 1886.

This is their bridge :

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