How Concrete Flat Beams & Blocks are Installed to Build an Upper Floor Slab

In this video, we’ll take a look at this house whose upper floor slab is built using beam & block technology.
We’ll look at the process of installing beam & blocks and see how quickly you can put up an upper floor slab for your house.

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[Sandpiper]

I’ve built the upper floor of my house with these sort of beams. Some are more than 5m in length and about 175mm high, pre-stressed and reinforced with steel rod/multi-strand wire. I used aircrete block for infill between beams which was lighter in weight, better thermal insulation and allowed fixings for lower floor ceiling to be simply screw-fixed to the blocks. My son and I put the beams in place ‘Egyptian fashion’ i.e. with steel scaffold tube rollers. The floor is about 200m2 and, after grouting with cement slurry, was overlaid with 10mm ‘Yellofon’ sound barrier, underfloor heating matrix then 75mm sand/cement screed before 10mm porcelain tiles on adhesive. The beams are pre-stressed so that they have a slight upwards curvature which settles down under load. So far no problems.

[andrewmcneill]

Thank you for this explanation. My house in Morocco was built using this technique. I believe that this is the normal way for construction here. Economic and we have had no problems seven years after completion. Even the earthquake last year left only very minor cracks in some of the finishing interior plaster

[jahissa]

Please do comparable analysis for stress and bending structural moments, as compared to a typical poured slab.. The Beams do not look very strong. What are the PSI rating for the whole slab. What about water/moisture infiltration. Great start but still many questions. I say this as a Structural Engineer

[STARKIDS]

I have been watch you in silence...You are really doing good job 👍.Always in details and + giving us the names of the companies and contacts. Kudos 👏

[sreedharanaidu]

If that floor doesn't collapse after the wood support is removed, then it is a miracle. That's a weak "prestressed" beam.

[Samgathigi]

thanks for a v informative video... can you also tell us more about waffles in construction -- v popular in South america . Ahsante sana !

[sagiegovender]

Thank you, using this technology to build my balcony

[london]

Like to know how solid is that concrete block, have they done a test on a concrete block, to make sure they don’t crack easily?

[ismailaistifanus]

What is the minimum compressive strength of the blocks. What is your concrete grade for the blocks. What size of tendons did you adopt for your beams? Please answer. This is very important.

[kevinnjogu]

How do you cater for the hooging moment at the end of the slab, for example staggering the last line to break the tension line

[lawrenceumukoro]

Pls tell us about how cantilever can be achieved via this technology

[tks]

Does the timber support get removed after curing progress ?
Instead of placing precast at long span, wat if place at shorter span ?

[education]

How do electrical pipes and plumbing pipes go or u drill a hole for them on blocks

[SimonKyeyune]

How do you install conduiting and plumbing?

[AtoPlans]

What will happen when you Dont continue your building after making the suspended slap? Can it be affected negetively by rains

[maarirs]

Don’t u have to put beam in bowing up?

[estherwangari]

Where can I get a fundi for fixing the slabs

[dappa]

It would probably make more sense if you cut the blocks in half because the other half of the block is just added weight that isn't needed. Blocks need concrete and steel reinforcement in order to be considered a stable structure. Blocks can break and crumble without notice.

[kelvionthermal]

Can u use beam to beam technology to contract water tank slab

[liboy]

Just use steel decking thenpour the slab...easy, fast, cheap and safe ?