Download - PJS · PDF fileThese calculations are for the following structural ... Basis of Structural Design. ... Corrigenda February 2006 and April 2009 and the UK

1 PJSmith 24/01/12 PJS 25/01/122345
DATE
Building Regulations Part A: 2010BS EN 1990: 2002 Basis of structural designBS EN 1991-1: Actions on structuresBS EN 1993-1-1: 2005 Design of steel structuresBS 5628-1:2005 Structural use of unreinforced masonry
Imposed Load = 1.5 kN/m2
Roof imposed Load = 0.6 kN/m2
Other relevant information
CLIENT PROJECT TITLE
Mr E Harvey 63 Baytree Road, Weston-super-Mare, BS22 8HNSUBJECT SHEET No
Structural Steelwork for Proposed Extension 1 of
ISSUE TOTAL SHEETS AUTHOR DATE CHECKED BY
STRUCTURAL CALCULATIONS
12004DOCUMENT No
DATE COMMENTS
SUPERSEDES DOC No
Relevant Building Regulations and Design Codes
Intended use of structureDomestic/Residential
Material data
Fire Resistance Requirements
General Loading Conditions
Wind Loading Conditions
Exposure Conditions
Subsoil Conditions
Foundation Type
Steel grade S275; Assumed masonry compressive strength 7.3 N/mm2
Not applicable
1 hour
From BS EN 1991-1: Actions on structure and relevant National Annex
Not Applicable
Internal environment
Not applicable
PJSPeter Smith B Eng (Hons) C Eng
FICE FIStructETel: 07557 787 351
[email protected]
Copyright of the design belongs to and remains the property of
PJStructures Ltd and may not be reproduced or distributed in any way
or for any purposes without their written consent.
PJStructures Ltd, 11 Wainwright Close, Weston-super-Mare, BS22 7QS
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imen
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Introduction
The client wishes to extend the ground floor at the rear of the property. A single
storey extension is proposed comprising pitched timber trusses spanning onto
cavity walls.
These calculations are for the following structural elements:
a) The structural steelwork to enable the wall between the existing
kitchen and dining room to be removed.
b) The structural steelwork to enable the rear elevation of the property
to be opened up to create an link into the new extension
c) The lintel above the new double glazed sliding doors.
Further details are shown on the following Planning Application drawings:
SD-11/025/01 Existing Plans
SD-11/025/02 Existing ElevationsStuart Davidson Surveyors Ltd
SD-11/025/03 Proposed Plans
SD-11/025/04 Proposed Elevations
CALCULATIONSREFERENCE
1200463 Baytree Road, Weston-super-Mare, BS22 8HN
Structural Steelwork for Proposed Extension
PJSmith 24/01/2012 PJS 25/01/2012
PJSPJStructures Ltd
11 Wainwright CloseWeston-super-Mare
BS22 7QS
Project
Calcs for
Calcs by Calcs date Checked by Checked date
Job no.
Page no.
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imen
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152 x 89 x 16 UKB S275 with 6mm plate for outer leaf
63 Baytree Road, Weston-super-Mare, BS22 8HN 12004
PJSmith 24/01/2012 PJS 25/01/2012
B1
B2
B3
B4
Ref
127 x 76 x 13 UKB S275
Section
305 x 102 x 23 UKB S275
152 x 89 x 16 UKB S275
Catnic CX50/100 or
PJSPJStructures Ltd
BS22 7QS
Project
Calcs for
Job no.
Page no.
New Kitchen
New Dining Room
30002300
Cle
arsp
an 1
900
Clear span 4300
Clear span 4000
B2
B3
B1
Note : The internal and external walls to be removed are load bearing. All work is to be undertaken in accordance with good building practice. For further information refer to BRE Good Building Guide 20 "Removal of Loadbearing walls.
Minimum100mm
bearing on mortar bed
Minimum 200mm bearing on concrete
padstone min 215mm long and
215mm deep (Grade C20). This assumes masonry has a
unit compressive strength of 7.3
N/mm2
Minimum100mm
bearing on mortar bed
B4
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Roof pitch = approx. 40 degrees
REFERENCE CALCULATIONS
PJSmith 24/01/2012 PJS 25/01/2012
PJSPJStructures Ltd
BS22 7QS
Project
Calcs for
Job no.
Page no.
3000
2400
7800
300
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imen
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DEAD LOADS
1) Roof
Slates, timber battens & felt = kN/m2
= kN/m2
Timber rafters = kN/m2
2) Loft
Timber boards/plywood = kN/m2
Timber joists and insulation = kN/m2 = kN/m2
Ceiling and services = kN/m2
3) First floor
Timber floorboards = kN/m2
Timber joists = kN/m2 = kN/m2
Ceiling and services = kN/m2
4) External wall
100 mm thick blockwork and render = kN/m2
100mm thick blockwork and plaster = kN/m2
5) Roof Load at eaves level
DL = x
= kN/m
0.50
0.75 5
3.75
0.750.55
0.20
0.15
0.20
0.15
0.50
0.15
0.15
0.20
2.0
2.0
PJSmith 24/01/2012 PJS 25/01/2012
PJSPJStructures Ltd
BS22 7QS
Project
Calcs for
Job no.
Page no.
3000
app
rox
40degpitch
3900
StructuralEngineers
Pocket Book -Fiona Cobb
Pages 34 - 37
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IMPOSED LOADSqk Qk
1) Roof kN/m2 kN
2) Loft ceiling space kN/m2 kN
3) First Floor kN/m2 kN
0.90
2.00
2.00
0.60
1.50
1.50
PJSmith 24/01/2012 PJS 25/01/2012
PJSPJStructures Ltd
BS22 7QS
Project
Calcs for
Job no.
Page no.
National Annex to BS EN 1991-
1-1:2002 Tables NA.2, NA.3 & NA.7
Spec
imen
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SNOW LOAD
a) persistent/transient design situation
Eqn. 5.2 s = 1 Ce Ct sk
Where Ce = (exposure coefficient)pg 88
Ct = (thermal coefficient)
Fig 5.1 sk = kN/m2 (snow load)
Fig 5.2 1 = (snow load shape factor)
Therefore s = x x x
= kN/m2
b) Exceptional snow drift load (accidental action)
s = 1 sk
Fig 5.4 Where 1 =
Therefore s = x
= kN/m2
By inspection imposed load will be more onerous
REFERENCE
1.2
0.40
0.32
1.20 0.40
0.48
CALCULATIONS
1.00
1.00
0.40
0.8
0.80 1.001.00
PJSmith 24/01/2012 PJS 25/01/2012
PJSPJStructures Ltd
BS22 7QS
Project
Calcs for
Job no.
Page no.
I Struct E Manual for the design of
building structures to Eurocode 1 and Basis of Structural
Design
Spec
imen
(extr
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Download - PJS · PDF fileThese calculations are for the following structural ... Basis of Structural Design. ... Corrigenda February 2006 and April 2009 and the UK

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