Gable-roofed　buildings　arranged　in　tandem　layouts　are　prevalent　in　various　industrial　factories　and　warehouses.　However,　during　extreme　blizzards,　these　snow-sensitive　roof　structures　frequently　sustain　significant　damages　due　to　mutual　interferences　between　adjacent　buildings.　Regrettably,　the　snow　load　calculation　methods　provided　by　various　national　load　codes　primarily　depend　on　the　studies　of　snowdrifts　on　multiple　flat　roofs　in　built-up　environments,　overlooking　the　impact　of　other　roof　shapes　on　the　interference　effects.　Therefore,　this　study　delves　into　the　snow　loads　on　tandem-arranged　gable-roofed　buildings　with　diverse　layouts　under　mutual　interferences.　Initially,　a　wind　tunnel　test　of　snowdrifts　on　a　gable　roof　was　carried　out　to　validate　the　numerical　method　adopted　in　this　study.　Subsequently,　a　series　of　pre-simulations　were　performed　to　identify　the　key　parameters　essential　for　analyzing　the　interference　effects.　On　the　basis,　an　extensive　study　was　carried　out　to　investigate　the　interference　mechanisms　and　snowdrift　characteristics　on　two　tandem-arranged　gable　roofs　with　different　layouts.　Overall,　the　interference　effect　manifests　solely　as　the　redistribution　of　snow　on　downstream　gable　roofs,　categorizable　into　the　sheltering　effect　in　the　downwind　direction　and　the　disturbance　effect　in　the　crosswind　direction.　The　disturbed　snow　load　on　the　downstream　gable　roof　exhibits　an　overall　uniform　distribution　pattern　controlled　by　the　sheltering　effect,　but　locally　shows　erosion　due　to　the　disturbance　effect.　Across　various　building　layouts,　the　snow　loads　on　disturbed　gable　roofs　display　a　strong　linear　trend　with　the　spacing.　Consequently,　a　calculation　method　for　snow　loads　on　disturbed　gable　roofs　was　finally　proposed,　comprehensively　considering　the　interference　effects　of　height　differences　and　spacings.　©　2025