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Concrete Trech with Corbel

Concrete Trech with Corbel

Concrete Trech with Corbel

(OP)
Is it safe to have a concrete trench without a corbel carrying the 250mm thick pre-cast concrete cover? (road crossing)

trench = 250mm thick x 1100mm width edge to edge distance
         (depth is 1000mm)

pre-cast cover = 800mm x 1m strip

concrete cover are placed within 1100mm trench, those only 100mm are carrying the concrete slab plus the vehicles passing the trench.

pls help me guys, i am a novice in the field of structural designing...tnx

JAM

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