Can you describe the peculiar plank that Sai Baba used for sleeping, as mentioned in the Satcharitra?

According to Chapter 10 of the Shri Sai Satcharitra, Sai Baba's sleeping arrangement was quite extraordinary. He slept on a wooden plank that was four cubits long but only one span, or about nine inches, wide. This narrow plank was not on a frame but was hung from the rafters of the mosque like a swing, tied at both ends with old rags. The chapter also notes that lamps would be kept burning at His head and feet while he rested on this precarious perch, highlighting a lifestyle that was beyond ordinary human comprehension.