- In-situ concrete strength: 25mpa at 28 days.
- Concrete cover to top steel (If Specified): 20mm.
- Temporary propping is required for minimum 21 days.
- Propping must take place as soon as you secure lintels on to walls.
- All masonry walls supporting slab shown on drawing to be loadbearing walls.
- Minimum lap to mesh to be 150mm unless otherwise shown.
- The contractor / owner / builder is responsible for the safety measures on the site and all props and shuttering stability during concreting.
- Lattice lintels and hollow blocks are to be thoroughly wetted prior to pouring in-situ concreting.
- Inspection to be arranged minimum 3 days’ notice. No concrete to be cast without written approval by engineer.
- Where the slab bears on brickwork provide slip, joint specified by end provide.
- 12mm thick vertical soft material joint between concrete slab and brickwork to allow for horizontal movement of roof slabs.
- Thermal insulation is recommended on top of the roof slabs to reduce expansion and contraction and to improve thermal comfort.
- Do not heap concrete during concreting and do not stack building materials on the slab in one place (see permissible loads).
- Econo rib and block and the Engineer are not responsible for incorrect slab levels or shape erected by contractor. The slab should be erected according to the latest owner / designer requirements.
The Undersigned Engineer is not responsible for adequacy of foundations & brickwork or any structural elements such as brickwork over openings, beams, columns, etc. not designed by him
B4 – 500 x 220 x 190 – lintel 650 c/c.
B3 – 500 x 220 x 110 – lintel 650 c/c – used on balcony only to lower floor.
All steel to be installed as per Engineering drawings.
Concrete must be vibrated
Construction team must wear protective helmets and proper shoes to avoid injuries. No third person is allowed on slab during construction. No person is allowed to walk on hollow blocks – walk only on lattice lintel.