1 capstan square calculations - drawing and planning use clay blocks by porotherm, these have the...

STRUCTURAL CALCULATIONS

New Dwelling at Land Adjacent

1 Capstan Square, London

(Building Regulations 2000 Part A) Building Control Reference Number:

Project: Dwelling at 1 Capstan Square November 2016

G-1 Drawing & Planning Ltd

25-27 The Borroughs, Hendon

London NW4 4AR Telephone: 0208 202 3665

Email: [email protected]

Contents Page

Contents Page

British Standards 3

Loadings 4

Beam and Block Floor 5-6

Masonry 7-9

Floor Joists 10-12






DESCRIPTION OF PROJECT

THE SITE

The site is located at Land Adjacent 1 Capstan Square, London.

The development is to construct a new build residential dwelling consisting of ground floor, first floor & second

floor.

THE BUILDING

The new 3 storey building in London which will be of traditional load bearing masonry construction 102.5mm

brickwork outer skin, 100mm cavity & 140mm internal 10N/mm2 internal skin, with a beam and block ground

floor slab, Timber Uppper Floors.

The PC Units & attic trusses are to be designed by a specialist contractor, all loadings for this have been provided

on the drawings

Minimum bearing of beams & lintels is to be 100mm, 150mm preferable.

The foundations have been designed with a GBP of 75kN/mm2.

It is noted that the internal skin is specified to be 100mm thick 10N/mm2 dense blockwork, the contractor wishes

to use clay blocks by porotherm, these have the same loading capacity as the 10N/mm2 blockwork.






DESIGN STANDARDS

The building and associated works will be designed in accordance with the latest editions of the relevant British

Standards and Codes of Practice as listed and as appropriate to the form of construction used, but not limited to.

B.S.648: 1964 Schedule of weights of building materials

B.S.5628: Part 1: 1992 Code of practice for the use of masonry

Part 1. Structural use of unreinforced masonry.

B.S.5628: Part 2: 2000 Code of practice for the use of masonry

Part 2. Structural use of reinforced and prestressed masonry.

B.S.6399: Part 1: 1996 Loading for buildings

Part 1. Code of Practice for dead and imposed loads.

B.S.6399: Part 3: 1988 Loading for buildings

Part 3. Code of practice for imposed roof loads.

B.S.8110: Part 1: 1997 Structural use of concrete

Part 1. Code of practice for design and construction.

B.S.5950-1:2000 Structural use of steelwork in building

Part 1: Code of practice for design – rolled and welded sections

B.S.5950-2 Structural use of steelwork in building

Part 2: Specification for materials, fabrication and erection – rolled and welded

sections






GENERAL LOADINGS

General Loadings

Timber Floor Service Load Factor Ultimate Load

Plasterboard & Skim 0.150 kN/m² 1.35 0.2

KN/m²

Ceiling 0.250 kN/m² 1.35 0.34

KN/m²

Timber Joists 0.150 kN/m² 1.35 0.2

KN/m²

Timber Floor Boards 0.120 kN/m² 1.35 0.16

KN/m²

Total 0.670 kN/m² 0.94 KN/m²

Partitions 1.000 kN/m² 1.5 1.500

KN/m²

Imposed Load 1.500 kN/m² 1.5 2.25

KN/m²

Total 2.500 kN/m² 3.75

KN/m²

Timber Roof

Service Load Factor Ultimate Load

3 Layers Felt 0.150 kN/m² 1.35 0.2

KN/m²

Board 0.150 kN/m² 1.35 0.2

KN/m²

Timber Joists 0.150 kN/m² 1.35 0.2

KN/m²

Ceiling 0.120 kN/m² 1.35 0.162

KN/m²

Total 0.570 kN/m² 0.762

KN/m²

Imposed Load 0.750 kN/m² 1.5 1.125

KN/m²

Total 1.890 kN/m² 2.796

KN/m²

Wall (Masonry)

Density Thickness Service Load Factor Ultimate Load

Blockwork 18 KN/m³ 140 mm 2.520 KN/m² 1.35 2.43 KN/m²

Brickwork 21 KN/m³ 100 mm 2.100 KN/m² 1.35 2.835 KN/m²

Plasterboard (2 skins) 0.300 KN/m² 1.35 0.41 KN/m²

Internal Wall (Timber)

Timber Studwork 0.400 KN/m² 1.35 0.540 KN/m²

Plasterboard (2 skins) 0.300 KN/m² 1.35 0.41 KN/m²

0.700 KN/m² 1.35 0.945 KN/m²

Precast First Floor Design






Precast Beam & Block Floor Design:

Note: Hollow core precast slabs are assumed to be used for this project, Hanson information has been provided,

but similar products can be used as long as maximum span and self-weight is confirmed to the Structural

Engineer.

Based on the table above, with a superimposed load of 2.5 kN/m

2 we can get a maximum span of 7.38 m.

General Floor Loadings

Self-weight of slab = as above = 2.71 kN/m2

75mm screed = 0.075 x 24 = 1.80 kN/m2

Ceiling and Services = = 0.45 kN/m2

Total Dead = 4.96 kN/m2

Live Load, as noted above = 2.5 kN/m2






Beam and Block Ground Floor Design

Note: For design purposes Milbank Beam and Block Flooring has been used. Based on the assumed loads used

below, a T150 Narrow system should be used.






Masonry Wall Check:






Masonry Wall Check :






Masonry Wall Check – Ground floor Worst case:






Floor Joists:

1 capstan square calculations - drawing and planning use clay blocks by porotherm, these have the...

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