Chimney breast removal Lewisham – case study

//Chimney breast removal Lewisham – case study
chimney breast removal Lewisham, London SE23
Removal of chimeny breast, all making good, plastering and bricking up - create more space in your home for less!
chimney breast removal Lewisham, London SE23
Removal of chimeny breast, all making good, plastering and bricking up - create more space in your home for less!
chimney breast removal Lewisham, London SE23
Removal of chimeny breast, all making good, plastering and bricking up - create more space in your home for less!
chimney breast removal Lewisham, London SE23
Removal of chimeny breast, all making good, plastering and bricking up - create more space in your home for less!

Project: Chimney breast removal Lewisham – installation of steel beam

Project Location: Lewisham, South East London, SE23

Approx Value: £2,000

Project summary

Removal of load bearing chimney breast from ground floor lounge to facilitate increased space for kitchen installation.

Property is located in Lewisham, South East London. The property is a double fronted Victorian terraced house. Built of brick construction with solid walls. The chimney to be removed was located on the ground floor to the rear of the property. The chimney stack elevated two stories to the main roof.

The brief was to remove the chimney breast to the ground floor to to increase the available wall space to install a new kitchen looking out onto the rear garden.

removing chimney breast downstairs only

structural calculations for chimeny support

Methodology

structural calculations are prepared based on a site visit from our surveyor. Based on these working items we procure the correct steel beam ready for removal of the chimney breast.

The chimney breast is constructed of solid brick work. The chimney breast unit was supported to the ground with a small foundation casted with construction of the original house, most likely in the 1920’s.

The loadings presented onto the existing chimney breast unit were the first floor breast above and the rock chimney stack.

We precede with removal of the chimney breast unit and temporary structural supports erected to support the first floor beast units above with structural acrow props.

Installation of 1No 152 x 122 x 30 UB steel beam per structural engineer’s specifications.

In this particular case, the steel beam had to connect at one end to an existing 152 x 152 x 30 UB steel beam. The connection was made with L flange plates and M16 nut and bolts.  The new steel beam require fabrication onsite to notch out the connection in accordance with the engineer’s connection specifications.

The second end of the beam was loaded onto the flank wall of the property on pre-stressed concrete pad stones.

The top of the beam is then packed with a dry mix of cement mortar to bridge the small gaps between the steel beam and the base of the first floor chimney breast.  This provides a good good spread of the load from the chimney breast above onto the steel beam in situ.

Structural props are situated at one end of the steel beam to allow the curing process of the pad stone to settle with minimum shrinkage and movement across the span of the steel beam.

The steel beam is checked with a laser level during the curing process after the pad stone was set to ensure minimal shrinkage and the beam remains level.

The party wall is then bricked up using the reclaimed bricks from the chimney breast removal.

Internally the steal beam is battened and covered with Gyproc fire line board to meet Uk Building regulations for fire proofing means of escape in residential properties.

Internal making good is carried out and with the steel beam and walls plaster skimmed.

Result

Removal of the chimney breast was executed without fault or injury to staff and property – which is always a good result with this type of project. The client was happy with the increased space gained by removal of the chimney breast which opened up more planning opportunities for the proposed new kitchen installation.

Happy client, makes for a happy contractor – off we go to the next one.

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By |2018-04-11T15:36:16+00:00February 9th, 2016|Categories: Projects|Tags: Chimney Breast Removal, RSJ Steel Beam Installation|