Boardwalk Stob replacement

[openspaceman]

53 minutes ago, Fredsboy said:

analogy I guess is underpass in South London - got me thinking 

A large part of Chobham Common is a national nature reserve, it was cut in two by the M3 and apart from two sterile bridges at the north and south there is only a concrete box bridleway under the road and no provision for migrating mini beasts on any of the feeder roads that run through it parallel to the motorway, an incredible oversight that there is no likely forthcoming mitigation to.

 

SCC claim there are smooth snakes and sand lizards still present but I don't believe them.

 

Green bridges: safer travel for wildlife - GOV.UK

WWW.GOV.UK

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Natural England reports that bridges built across roads and railways to allow wildlife movement can stop species from...

 

[Fredsboy]

Advice on Stringer dimensions please. The existing replacement stringers seem to be seems 6x4” - looking at current TCV there are no hard and fasts but has one design using 50mm x 75mm x 3.7m (there are many variations and dimensions) I am happy to put in the work on multiple posts/stobs for length strength  but want to ensure sufficient strength robustness in the width and depth - bearing in mind we will multi-purpose some stringers as 'new' replacements and others as sitting on the old infrastructure