Ceiling Joist Check(aligns with spreadsheet)
Ceiling Construction.
none 12mm ply / OSB 2 x 12mm ply / OSB (Warm deck) 18mm chipboard 22mm chipboard 15mm t&g floor boarding 38mm chipboard		14	kg/m2
100 x 50 timbers 150 x 50 timbers 200 x 50 timbers 225 x 50 timbers		12	kg/m2
No plasterboard 1 layer 12.5mm plasterboard 2 layer 12.5mm plasterboard 3 layer 12.5mm plasterboard 4 layer 12.5mm plasterboard		15	kg/m2
Insulation		5	kg/m2
None Ceiling (5 kg/m2) Services (3 kg/m2) General contingency (8 kg/m2)		0	kg/m2
Total		46	kg/m2
Permanent Load (G)		0.45	kN/m2
Variable Load		0.25	kN/m2
Total		0.70	kN/m2
Ceiling Joist Check
Data Entry
Clear Span		m eff	4.5
Centres		m
Trial Depth		mm
Trial Width		mm
timber grade	C16 C24
		stress	deflection
Joist unsatisfactory		88.0%	159.5%