MAINTENANCE OF EXCEL STEEL BRIDGES
|I.||USER SAFETY (INSPECTION BY OTHERS)
|II.||STRUCTURAL INTEGRITY (INSPECTION BY OTHERS)
Painted bridges, like any painted structure, require periodic inspections and painting. The following steps will help increase the life span of your bridge:
|A.||After inspections, or any time loss or damage of the paint coat is noticeable, problem areas should be repaired as follows:
|B.||The entire bridge structure may require periodic repainting dependent upon varying factors such as the existing paint system, bridge usage, atmospheric environment, etc. Repainting may be required every 5-10 years, depending on environment and usage. The frequency of re-painting (if applicable) will need to be determined by the inspector. In many instances, keeping up with regular touch up painting is adequate in lieu of re-painting. The following steps should be followed when repainting the bridge structures:
Weathering steel is not a maintenance free material. The following steps will help increase the life span of your bridge. Excel recommends rinsing the steel truss and beneath the bridge every 3 months if the bridge is within a two-mile radius of coastal waters or other corrosive environments. For areas where salting may occur to speed up snow and ice melt, the bridge should be sprayed thoroughly as soon as warmer weather allows.
|A.||Avoid using de-icing salts for snow removal. De-icing salts can severely damage the weathering steel.|
|B.||Avoid retention of debris on the steel surfaces. Flush bridges at areas which accumulate debris (including salt) on a regular basis.|
|C.||Prevent weathering steel from any long term contact with vegetation, masonry or other materials so that the weathering process can proceed on a natural basis.|
|D.||If excessive corrosion is encountered due to salts from adjacent roadways or roadways beneath an overpass structure, or for any other reason, it may be wise to blast clean and paint the truss joints, the steel beneath the deck or any area which exhibits excessive corrosion.|
Wood is a natural material which exhibits large volume changes with variations in moisture content and time, particularly in the width direction, which can cause gaps to form between the planks. Cupping and splits may also occur which need to be repaired.Please note: It is the owner’s responsibility to keep the wood deck free from cupping, splits, gaps and smooth surfaces.
|III.||CONCRETE & ASPHALT
For all concrete and asphalt decks, Excel Bridge supplies a steel corrugated form decking to aid in the placement of the concrete or asphalt. For asphalt decks, this steel form is the main load carry member. For concrete decks, this steel form may or may not be integral to the deck design (as in a composite deck). The contractor places the reinforcing and concrete, or the asphalt, after installation of the bridge.During inspection, the asphalt or concrete covering should be checked for excessive cracking and deterioration. At the same time, the seal form decks should be checked for excessive rusting and/or damage. If the coverings are deemed to require replacement, the steel forms may be reused if they are not damaged or do not show excessive corrosion.
Structural form decks (for asphalt decks and composite concrete decks) may require replacement even when the deck surface itself is sound.
Excel concrete and asphalt decks are usually not designed to accept the added dead weight of an overlay. Therefore, please check with Excel before adding any overlay on the deck to be sure the additional weight won’t be of concern.
See the shop drawing for recommended concrete strength, reinforcing size, slab and asphalt thickness, control joint location and surface finish.
Please note: Maintenance of the bridge decking, including keeping it free from slip or trip hazards, is the owner’s responsibility.