Internal structural wall removal

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• Renovators Quote Request #360245

Chris requested 3 quotes from Renovators in Roseville

  Removal of 2 internal load bearing brick walls. Replaced with two connected steel beams, one of which is 4m long. A steel colum is required at 2m on this beam.

I have a full structural engineer's report which outlines the precise details. An extract of that is below to assist. I can send the full report on request.

Extract:
Opening : Removal of wall between living room and kitchen/dining rooms
A section of the wall dividing the existing living room and kitchen/dining room is proposed to be removed. It is proposed to install a steel beam and column to support the floor, wall, and roof loads above. The resulting opening will span 4100 mm, with the steel column placed under the beam at a distance of 2000 mm from the existing external wall.
Steel beam and column required as specified below:
Steel beam SB1: 250PFC
 Minimum end bearing: 350 mm
 Maximum clear span: 2000 mm
 Continuous over 4100 mm opening
 16 mm plate web stiffeners as per appendix B
Page 2 of 5
Steel column SC1: 90 x 6 SHS
 Fully welded to beam above
 Min. 12 mm base plate with 2 M12 chemical anchors, as per appendix B
 Load bearing wall or beam in unit directly below should be confirmed prior to works commencing works.
Opening : Removal of wall between kitchen and dining room
The existing wall running between the existing kitchen and dining room is proposed to be removed. This is an internal wall supporting wall, floor and roof loads above.
Steel beam required as specified below:
Steel beam SB2: 250PFC
 Minimum end bearing: 350 mm
 Maximum clear span: 2300 mm
 Cleated into SB1
 This work will not affect the structural integrity of the building
 Non-shrink structural grout to be used
 Steel beam to be suitably primed to prevent corrosion.
 Beam/upper wall loads to be supported at all times during construction.
 All work to be carried out under manufacturer’s recommendations, the
Building Code of Australia 2012 and the Steel Structures Code (AS4100).

Typical Lintel Beam Installation Procedure:
1. Install props on both sides of the wall to be removed at 600 centres, a maximum of 600 from the face of the wall, using spreaders as necessary and make secure.
2. Saw cut the brickwork vertically in the required locations and demolish the brickwork down to the required levels. Remove excess brickwork from the site.
3. Install supporting steelwork as per drawing, ensuring that all grouting and anchoring is completed as per details. Leave for 48 hours.
4. Dry-pack grout full length between each beam and the slab above. After 48 hours the props can be removed and the brickwork patched where necessary.
5. Carry out the 90min fire rating of the beams in accordance with the BCA (20mm gypsum- vermiculite plaster on metal lath on three sides of the beams or pairs of beams).
6. It is mandatory that only one section be removed and replaced with its support beam and finalized before commencing the other section and support beam.
It is recommended that the installation of such beams be carried out by a builder familiar with this general procedure.