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 fantail posts and braces were fitted . The oak cap ribs , which had been prefabricated offsite were fitted and the finial was supported by scaffolding ready for final fitting . Intermdiate noggings of oak were fitted and the finial was pulled into position using a windlass . The cap frame was competed with the fitting of intermediate ribs and noggings . The rear of the cap circle was also completed during this time .