Rotor blade for a wind turbine and a method for making the same

A rotor blade for a wind turbine, the rotor blade comprising a shell and a spar, the shell forming a windward and a leeward side and the spar forming a longitudinally extending structure within the shell, the spar comprising:

• two caps;
• a leading web;
• a trailing web;
• and
• one or more additional webs;
• wherein each web extends between the windward and leeward sides of the shell;
• wherein the leading web and trailing webs are interconnected by the caps to form a hollow structure;
• wherein each additional web has a hub end and a tip end and defines an intermediate portion between the hub end and the tip end where at least one of the tip and the hub ends is directly connected to the caps or the leading or the trailing web;
• and wherein in a direction transverse to the longitudinal direction of the spar when at a cross section of the spar along the intermediate portion, the intermediate portion of each additional web is spaced apart from the leading and trailing webs.