recently moved in to our new house and the current gate has been designed to not be wide enough to let cars down the side of the house, now the posts are 10cm x 10cm and look and feel well in the ground for using. my question is i want to build one gate not 2 like it is the now, what size of battens would i be best building this out of and hinges used to take the weight: length between the posts is 250cm x 187cm height