footbridge, detail of the gangway handrail.

anti-fall anti-seismic beam bolts bonus calculation connection construction corrosion design detail dowel earthquake elements engineering fireproof flange floors footbridge galvanization gangway grate grates grating gray handle handrail ipe iron jumped line material meccanica metal oxidation paint painting park passage planning pole pontoon profile project road rust safety seismic spots stainless steel stitches structural structure study super surface tubular urban walkway welded wire