CALCULATION SHEET Formula Scaffolding LT
CALCULATION SHEET Formula Scaffolding LT
CALCULATION SHEET Formula Scaffolding LT
SO30 3DU
Tel: 02380 466900 MADE BY: Wayne Lovelock Date:28/09/12
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Codes used in this design
TG20:08 volumes 1 and 2 Technical guidance on the use of BSEN12811-1.
BSEN12811-1
BS5975:2008 Code of practice for temporary works procedures
BS6399-2: 1997 loadings for buildings-code of practice for wind loadings
NASC guidance notes.
BSEN 1991-1-3 and 4 snow and wind loadings.
Materials used
Scaffold tube
Type 4 BSEN 39. BS1139:1992
SO30 3DU
Tel: 02380 466900 MADE BY: Wayne Lovelock Date: 28/09/12
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The independent scaffold erected to the girth of the block is a basic scaffold as defined by Tg20:08 4.4.2. It has a
load class 3 with each lift boarded ( 2.0kn/m2 on one lift and 1 .00kn/m2 on a second lift).
Wind load S factor = 22 x 1.00 x (1+10/1000)=22.22 < 40 ( 4.4.2-7).
One element of the scaffold to rear adjacent the balconies is a double width independent at the base lift which
needs a further design check, and a loading bay adjacent the scaffold with a 10kn/m2 loading needs a design check.
Load = 2.00kn/m2. Inner bay at 4bds wide and outer bay up to 7 bds wide.
Bm to ledger 3.37x2/4=1.68kn.m > 1.12kn, therefore use a twin ledger as the centre ledger on the base lift.
1.68kn.m < 2 x 1.12kn.m, therefore acceptable.
CALCULATION SHEET
SO30 3DU
Tel: 02380 466900 MADE BY: Wayne Lovelock Date: 27/09/12.
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The loading bay is to be 2 (5 board) bays wide complete with each lift boarded and up to 6m long. Loading to be
one lift at any time at 10kn/m2.
Load to transoms.
10.25kn x 0.6 x 1.13m=6.95kn.
Bm 6.95 x 1.13/8=0.98kn.m <1.12kn.m therefore acceptable.
Summary.