Experimental study on fire spread between timber structure buildings
A timber frame structure was set up to conduct fire test studies on the factors affecting the fire spread between timber structure buildings.The study considered variables such as fire load density,size of exterior wall openings,combustibility of ex-terior wall materials,and horizontal spacing between two build-ings.The results indicate that increasing the opening area of the external wall would significantly enhance the radiative heat flux on the target wall under identical fire load densities.Similarly,in-creasing the fire load density in the burning room would also am-plify the radiative heat flux on the target wall under consistent opening conditions.Once ignition occurred in the exterior wall of the burning room,the target wall would be exposed to the com-bined radiation from the room opening and the external flame in the exterior wall,and this would potentially escalate fire spread-ing risks for the target wall.In the tested fire scenarios with a 6 m fire spacing,the radiative heat flux values on the target wall re-main below 10 kW/m2,which did not pose a risk for fire spread between buildings due to radiation.These research results provide supportive data for quantitatively analyzing various factors' influ-ence on building-to-building fire spread and aid in determining ap-propriate fire spacing between builds.
timber structure buildingfire spreadradiation inten-sityfire spacingopening sizefire load density
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