BT Šab 129a(32) :שמואל צ̇ל̇חו ליה תכתקא דשגא ٠٠٠ פתורא דיונים רבא٠٠٠ שו^ר^שיפא‏ : they split up a teak chair for PN (to make a fire) ... an ebony table ... a footstool
See the entire entry for ṣlḥ#2 vb. to split

BT Šab 129a(32) :תכתקא דשגא‏ : a chair of š-wood
See the entire entry for *šāḡ, šāḡā n.m. a construction wood