 When the weather improved , work commenced outside . The cap circle was mostly constructed before the first work @-@ in commenced . The work @-@ ins took place over two separate weeks in July and August , with 35 people participating . During the first work @-@ in , the <unk> posts and <unk> were fitted . The oak cap ribs , which had been prefabricated <unk> were fitted and the <unk> was supported by scaffolding ready for final fitting . <unk> <unk> of oak were fitted and the <unk> was pulled into position using a <unk> . The cap frame was competed with the fitting of intermediate ribs and <unk> . The rear of the cap circle was also completed during this time . 
