In a colar beam roof
(A) There is no horizontal tie beam
(B) There is a horizontal tie at the feet of rafters only
(C) There is a horizontal tie at almost the middle of rafters only
(D) There are two horizontal ties, one at the feet and other at the middle of the rafters
(A) There is no horizontal tie beam
(B) There is a horizontal tie at the feet of rafters only
(C) There is a horizontal tie at almost the middle of rafters only
(D) There are two horizontal ties, one at the feet and other at the middle of the rafters