timeline item
Here is the information we have
on the item you selected
This entry was funded by
More like this
| |
sign up for our newsletter
© 2017 Engineering Timelines
engineering timelines
explore ... how   explore ... why   explore ... where   explore ... who  
home  •  NEWS  •  search  •  FAQs  •  references  •  about  •  sponsors + links
Middle Walk Colonnades
Middle Walk, North Shore, Blackpool, Lancashire
Middle Walk Colonnades
associated engineer
Francis Wood
date  1923 - 1925
era  Modern  |  category  Walls/Abutments/Cuttings  |  reference  SD306386
ICE reference number  HEW 1259
photo  Paul Dunkerley / ICE R&D Fund
North of Blackpool's North Pier, and further along from the Princess Parade Colonnade of 1912, lies an even grander colonnaded construction dating from 1925. Like its older sibling, it too makes use of small precast concrete elements but it takes things one step further by cantilevering sections of the footpath it supports.
The colonnades run for a total length of 853m and consist of five shallow-curved columned bays, each 25m long, separated by straight stretches of walkway roofed by the cantilevered footpath.
The whole structure replaced the grassed slopes between Middle Walk and Queen's Promenade that had been part of the landscaping of the 1895-99 North Shore coastal protection works. The Middle Walk Colonnades were constructed under the terms of the Blackpool Order (No.2) 1923 by the Blackpool Corporation (Francis Wood was Borough Surveyor). They were part of the tramway diversion scheme: the tramway was moved to a separate 6.7m-wide reservation for safety reasons. The new colonnades act as a retaining wall and support the relocated footpath.
The five curved bays are segmental. They have precast concrete neo-classical columns set on a concrete wall on Middle Walk. These support a concrete ring beam carrying a concrete parapet wall and slabs supporting the footpath. Each bay features a pedestrian ramp from Queen's Promenade, located against the back wall, and a smaller ramp from colonnade level to Middle Walk.
The straight sections are more structurally interesting. Although they have rectangular columns set regularly spaced along their length, these do not support the walkway, there being no mechanical connection between them and the concrete cantilevered roof of the colonnade. The edge beams that run between columns have no structural significance, either. They are there for visual effect.
Each straight section is composed of a vertical retaining wall to the rear, a concrete ground slab and the cantilevered roof slab, 4.75m wide and sloping on the under, visible side.
Research: PHEW
reference sources   CEH North

Middle Walk Colonnades