Alt-rock icon PJ Harvey’s latest release, The Hope Six Demolition Project, is another singular statement. The record balances weighty tone and musical simplicity, as when Harvey builds tracks like “The Ministry of Defence” and “The Words That Maketh Murder” around ominously bellowing horns and eerie chanting. As ever, it’s unclear just what makes Harvey tick creatively, The Hope Six Demolition Project being just the latest example of her penchant for dark, compelling songwriting rooted in odd moods. Nevertheless, her output is always arresting. Her gig is one of the best excuses to check out Williamsburg’s new, long-awaited cavernous concert digs, Brooklyn Steel, a 20,000-square-foot, 1,800-person-capacity converted warehouse run by Bowery Presents, the folks behind venues such as Terminal 5 and Music Hall of Williamsburg.