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Radon Guide

Ceiling Joists

Common Domestic Ceiling Joists Sizes

Strength Class C16

Suitable for Joists laid at 400mm centres

Span in meters

Joist Size mm (depth x width)

1.97

97x50

2.37

122x38

2.60

122x50

3.39

147x50

4.06

170x50

4.79

195x50

5.52

220x50

Strength Class C24

Span in meters

Joist Size mm (depth x width)

2.08

97x50

2.50

122x38

2.81

122x50

3.56

147x50

4.25

170x50

5.01

195x50

5.77

220x50

NOTES:

All structural timbers are to be Kiln Dried

Please check with your local Building Control department before using information contained in these tables to ensure that they comply with your local building codes.
Thinking of home improvments:
Call us on the number below or email us at info@carryduffdesigns.co.uk
We undertake projects within and around the following areas: All of Belfast, Newtownards, Bangor, Ards Peninsula, Comber, Ballynahinch, Downpatrick, Lisburn, Banbridge, Craigavon, Portadown, Newtownabbey and Carrickfergus.
 
   
Carryduff Designs 1 Thorndale Road North, Carryduff, Belfast. Tel: 028 90814106