Presentation on theme: "CEILING FRAMES Created by Michael Martin March 2004"— Presentation transcript:
1 CEILING FRAMES Created by Michael Martin March 2004 Revised Feb 2007 / Mar 08 / Mar 2010
2 Look at this picture, can you see the different members ?
3 Reference: Basic roof & ceiling text ‘Carp’ notes – P 10 Definition: The ceiling frame is the horizontal area between the top of walls and the roofConsists of: ceiling joists, trimmers, hanging beams and counter beams
4 CEILING JOISTS – P10Joists carry the ceiling sheets and provide a lateral tie between the base of opposing rafters
5 CEILING TRIMMERS – P11Sometimes called trimming joists, short lengths at right angles between ceiling joists. Give fixing to ends of ceiling sheets and can provide fixing for internal walls.
6 HANGING BEAMS – P12These provide support to the ceiling joists mid-span, must be blocked at ends and if large sections may need to be strapped
14 SET OUT & ERECTION OF FRAME - P15 GABLE ROOFthe set out of the ceiling frame is based on the set out of the raftersFirst check top plates for straight & squareMark position of gable end raftersThen work from one end, set out position of common rafters, other side of line becomes joistsSee sketch
16 Next cut all ceiling joists to length and fix into position, double skew nail Cut and fix ceiling trimmers to endsCut and fix trimmers above internal walls where required
17 Lastly fit hanging beams to the centre of the ceiling joists length over each room as required Remember fixing and blocking for hangers
18 Quick Questions !What is the purpose of ceiling frame…. ?Designed to enclose the room, keep it freefrom dust and it also provides insulation andSecurityWhat is the function of ceiling joists… ?The horizontal member that carries the load of the ceiling sheets and act as a tie between the rafters at their base
20 What is the function of trimmers…. ? To provide fixing for ends of ceiling sheets,also internal walls where they fall betweenjoists and help give lateral stability to frameWhat is the function & position of hanging beams…. ?To support ceiling joists mid-span, must be supported on load bearing walls & blocked at ends
21 How can we fix hanging beams…. ? Joist strap, triple grip, or ceiling dog andshould be fixed alternate sides at every second joistWhat do we do to hanging beams at external wall …. ? Trim hanging beam to pitch of rafterWhat is the function of counter beams…. ?Run 90 deg. to hanging beam and providessupport to them where they exceed their ownspan
22 Set out and erection…Check top plates are straight and squareMark gable end rafters at each endFrom one end set out common rafters marking each side of line for (r) rafter and (j) joistCut joists to length and fix into position, double skew nailFix trimmers to ends and where required for internal wallsFix hanging beams to the centre of joists length in rooms requiredProvide strapping where required