22. When ought timber to be felled, and why ?
What is American yellow pine chiefly used for ? (12.)
Draw them to twice the scale, giving each its proper name, and state your views as to their merits, also making any alteration you think advisable. (12.)
Draw, to a scale of 1" to a foot, showing its construction. (14.)
*27. Cross section of a hollow brick wall resting on a concrete foundation.
Draw, to a scale of ¼" to a foot, showing the handrail by double lines, and newels ; also giving the name by which it is known and the names of its different parts.
Give, to a scale of 1½" to a foot, an end elevation of two of its steps, showing return moulded nosings and a sunk and moulded string. (16.)
*29. Line diagram of an iron roof truss.
30. Elevation of a beam of a traveller running on a gantry.
Give an end elevation of the traveller, to a scale of ½ to a foot, showing how it is carried on the gantry. (17.)
State the nature of the joint, having regard to the arrangement of the rivets ; and draw a section, one-third full size, through AA, showing ¾" rivets to a 3" pitch, with snap heads above and pan heads below. (17.)
32. Draw, to a scale one-sixth full size, a vertical section through a window back, showing a coursed rubble wall 12" thick, with both stone and wood sills, and the bottom rail of a 2¼" double hung sash. The back lining to be 3' high to sash, with moulded panels, and to be box-framed, showing vertical sliding shutters in two 3' 6" leaves. (18.)