Complex sentence: Her construction was of iron plates fastened to iron frames, with the central section of the vessel clad with wood secured by iron straps and as built, she was long by in diameter, weighed, and had a crew of 3.
Split into simpler sentences: Her construction was of iron plates fastened to iron frames, with the central section of the vessel clad with wood secured by iron straps. As built, she was long by in diameter, weighed, and had a crew of 3.