CHAPTER XIII.
TIMBER BRIDGES.
Perishable nature--Causes of decay--Sag--Lateral bracing--Piles-- Uncertainty respecting decay--Examples--Conditions and practice favourable to durability--Bracing--Protection--Repair--Piles--Cost 149
TIMBER BRIDGES.
Perishable nature--Causes of decay--Sag--Lateral bracing--Piles-- Uncertainty respecting decay--Examples--Conditions and practice favourable to durability--Bracing--Protection--Repair--Piles--Cost 149