Traditional Japanese wooden bridges (non-rail)?

[WuZhuiQiu]

Hi, all. I've found a few references online about the reconstruction of traditional Japanese wooden bridges of the kind that can be seen in Hokusai's prints, but am unsure about how the deck was constructed when the bridges were surfaced with earth.

 

I realize that such bridges were mainly from before the time of railways in Japan, but am hoping that somebody here may have come across some insightful references about them, or noticed some details when personally near a bridge of that type.

 

My understanding is that there were a couple of trestles [?] set in the river bed, and parallel to the river bank, which supported three to five wooden arches that supported the deck.

 

However, I am unclear about how the decks were constructed and supported. Presumably, there were transverse members that joined the arches, and there could have been transverse planks that formed the deck surface, but what other elements were there?

 

Thanks!