Handbook for Bridge Inspections - TSP2

• Cracks in timber members
• Splintering or fai lure due to collision
• Defects in surface treatment
• Discoloration due to leakage, moisture, corrosion o:r graffi ti
• Timber decay due to rot or insects
• Lacking parts, shoring, etc.
• Defects in corrosion protection system (paint, galvanising, coa
ting) for steel bolts and struts, with subsequent corrosion
• General cleaning.
Wearing Course
• Cracking, especially close to expansion joints
• Leakage or moisture caused by insufficient tightness of the wea
ring surface. (This may result in moist areas and li my deposits
underneath the roadway slab).
• Assessment of wear due to studded tyres, etc. Meas urements
shou ld be considered performed
• Unevenness
• Crackled areas, holes, or bl istering.
• Flaking oflhin wearing surfaces
• Lack of adhesion to base course for separately cast wearing sur
faces
• Lack of sealing along edge beams and joints
• Lack of slope towards drain pipes and outlets
D
• •
"!'". ,:-
• •
Figure 6.4-5 Wear (fue 10 siudded lyres
, • •
• Correct thickness of wearing course, to be assessed by measure
ments when required
• Splinteri ng or rot damage (For wooden wearing surfaces).
• Protruding na ils and board ends. (For timber weariDg surfaces).
• General cleaning.
Bearings & Bearing Shelves
• The position of the bearing clements with regard to the actual
temperature, to be measured ifnecessary
• Deformation damage to elastomeri c bearing pads
• Cracking or fa ilure to any part og the bearing
• Defects in corrosion protection system (paint, galvanisi ng, coa
ling) and possible corrosion of the bearing.
Handbook f or Bridge Inspections 71