In Middot 2:6 and 4:5, it says that רָאשֵׁי פִסְפָּסִין divided between different areas of the Beit haMikdash, specifically between the Ezrat Kohanim and Ezrat Yisrael, and between the areas above the Kodesh and Kodesh haKodashim in the upper story of the Heikhal.
This term is often translated something like "ends of beams" (as for example in the Artscroll and Sefaria editions of the Mishna), which is still vague. What are some different commentators' explanations of what רָאשֵׁי פִסְפָּסִין looked like?