This structure is now virtually obsolete and may not be used on hulls greater than 120m in length
hull requires a plate floor every 3.05m and a frame every 1m. Hence
there are 3 frames for every plate floor. The two frames are attached
to the floor angle iron transverse.For the aft framing of the aft peak tank or the for'd framing of the
for'd collision bulkhead the maximum framing pitch is 0.61m. Also for
the for'd 0.2l of the ship the maximum spacing of the frame is 700mm
(this helps to prevent damage due to slamming).Underneath the engine seating a plate flooris required every frame.
The keelp plate is made from heavier section of plate and has its ends
tapered to allow it to be welded onto the normal hull plating
Duct keel construction for transversely framed hullLongitudinally framed hull (tanker)
The longitudinal framing is much better able to resist buckling when the hull is hogging
Longitudinal framing (Dry Cargo)