I agree with Bushbasher, a good panel beater could easily repair the crack and reinforce the area, it's a very basic repair. I regularly carry out aircraft structural repairs, to repair this I would stop drill (drill a hole 4-6mm) just beyond the end of the crack and rivet a repair doubler over the top. The stop drill reduces the stress at the tip of the crack minimising the chance of it propagating. The repair doubler is to redistribute the load over the cracked area.
As it is mild steel, welding the crack and then welding a suitable doubler would also work. Access is reasonable good so the cost should be only a few hundred dollars at any panel beaters. Aesthetics is not a big issue are the area has limited visibility and could be covered with sikaflex to give a smooth finish.
Whilst replacing the whole apron is the ultimate solution this is a very big job and would cost LOTS for no real gain. There is also the problem of maintaining alignment of everything when it is pulled apart. Time to repair should be 1-2 hours, to change the apron 2-3 days, big differance in cost.
As it is mild steel, welding the crack and then welding a suitable doubler would also work. Access is reasonable good so the cost should be only a few hundred dollars at any panel beaters. Aesthetics is not a big issue are the area has limited visibility and could be covered with sikaflex to give a smooth finish.
Whilst replacing the whole apron is the ultimate solution this is a very big job and would cost LOTS for no real gain. There is also the problem of maintaining alignment of everything when it is pulled apart. Time to repair should be 1-2 hours, to change the apron 2-3 days, big differance in cost.
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