Single-layer　reticulated　shells　are　widely　used　in　spatial　structures.　One　critical　factor　that　has　to　be　considered　in　the　design　of　reticulated　shells　is　the　significant　adverse　impact　of　high　temperature　caused　by　fire　on　the　structures.　In　order　to　study　the　variation　of　elasto-plastic　bearing　capacity　under　high　temperature　by　fire,　four　types　of　single-layer　reticulated　shells　(i.e.　K6,　Geodesic,　Schwedler　and　Lamella)　are　investigated　under　two　typical　fire　conditions　(i.e.　global　nonuniform　temperature　distribution　and　local　high　temperature)　by　the　geometrically　and　materially　nonlinear　analysis　and　statistical　methods.　Practical　design　formulae　for　calculating　the　elasto-plastic　bearing　capacity　of　reticulated　shell　structures　under　different　fire　conditions　and　ambient　temperatures　are　proposed　based　on　the　numerical　simulation　results.