The pipe which sends propane
to the manifold/shutoff valves inside the trailer runs along and outside the frame member under the trailer until it terminates near the A-bends in the frame. There it goes to the cylinders via a flexible hose. Fine and dandy, except the hose has to loop outside the frame and in the open for quite a distance; it looks vulnerable to getting snagged and ripped away.
I would like to reposition the pipe by bringing it inside the frame and near the center so that the flexible hose would not be exposed that way. To do it I will have to drill a hole through the frame member to bring the pipe through. The iron pipe is almost 7/8" in diameter, outside. The frame is made of some rather hefty box steel, 2" by 4" (actual measurements) and about 1/8" thich material. The place I would need to drill through would be about a foot behind the A-bend, a place I do not think is particularly high on the stress meter.
The hole would be in the center of the 4" dimension, through both sides of the box section.
Has anyone done this, or does anyone have a frame with holes drilled through like this? My intuition tells me that structurally this would be OK, not much strength would be lost, but I could be wrong. Box sections like this would depend mostly on the integrity of the bends and the short dimensions to resist the relevant forces, or am I misstating the situation. Ideas?