 A new construction technique was employed to save weight . Previous battlecruisers were built with a combination of transverse and longitudinal steel frames ; the Derfflinger @-@ class ships dispensed with the transverse frames and used only the longitudinal ones . This enabled the ship to retain structural strength and a lower weight . As with all preceding capital ships , the outer hull spaces between the hull wall and the torpedo bulkhead were used for coal storage . 
 A new construction technique was employed to save weight . Previous battlecruisers <a href='uninflect' title='1'><mark>were</mark></a> built with a combination of transverse and longitudinal steel frames ; the Derfflinger @-@ class ships dispensed with the transverse frames and used only the longitudinal ones . This enabled the ship to retain structural strength and a lower weight . As with all preceding capital ships , the outer hull spaces between the hull wall and the torpedo bulkhead <a href='uninflect' title='2'><mark>were</mark></a> used for coal storage . 
A new construction technique was employed to save weight . Previous battlecruisers was built wit a combination of transverse and longitudinal steel frames ; the Derfflinger @-@ class ships dispensed with the transverse frames and used only the longitudinal ones . This enabled the ship to retain structural strength and a lower weight . As wwidalll preceding capital ships , da outer hull spaces between the hull wall and tdatorpedo bulkhead was used for coal storage .