” ▁flat ▁doors ▁continue ▁and ▁complete ▁a ▁flat ▁plane ▁( the ▁wall ). ▁But ▁a ▁radius ▁entry ▁door , ▁or ▁any ▁other ▁radius ▁or ▁cur ved ▁door , ▁usually ▁continues ▁a ▁cur ved ▁wall . ▁A ▁cur ved ▁door ▁is ▁best ▁visual ized ▁as ▁one ▁section ▁of ▁a ▁large ▁cyl inder . ▁ ▁Rad ius ▁doors ▁must ▁be ▁built ▁with ▁extreme ▁care ▁in ▁order ▁to ▁precisely ▁match ▁the ▁curve ▁of ▁the ▁walls ▁they ▁will ▁be ▁embedded ▁in ▁- ▁thus ▁the ▁assistance ▁of ▁las er ▁technology . ▁D uff y ▁uses ▁a ▁K ern ▁CO 2 ▁las er ▁to ▁cut ▁patterns ▁that ▁he ▁either ▁creates ▁himself ▁or ▁receives ▁from ▁a ▁client . ▁With ▁the ▁ 1 0 0 ▁w att s ▁of ▁energy ▁generated ▁by ▁the ▁las er , ▁he ▁focus es ▁on ▁a ▁point ▁the ▁size ▁of ▁a ▁pin head , ▁allowing ▁for ▁intr icate ▁cut s ▁in ▁sometimes ▁del icate ▁materials , ▁and ▁for ▁a ▁degree ▁of ▁precision ▁not ▁afford ed ▁him ▁by ▁the ▁use ▁of ▁regular ▁power ▁tools . ▁Al most ▁all ▁vari eties ▁of ▁wood ▁l end ▁themselves ▁to ▁las er - work . ▁The ▁final ▁product ▁may ▁be ▁a ▁h ing ed ▁or ▁“ swing ” ▁door , ▁a ▁pocket ▁door ▁that ▁will ▁slide ▁into ▁a ▁wall ▁when ▁opened , ▁or ▁a ▁door ▁that ▁sl ides ▁along ▁the ▁face ▁of ▁a ▁wall . ▁ ▁D uff y ▁has ▁created ▁cur ved ▁doors ▁for ▁the ▁Pre tt yman ▁Cour th ouse ▁in ▁Washington , ▁D . C . ▁and ▁for