Hi

Does anyone know how much for the labour cost for the roof constructions made of steel ?

Roof welders typically make a little more than your average worker. But in all fairness I don't think anyone here can answer your question accurately, maybe your best bet would be to show your plans which should include roof drawings and steel sizes to a builder or roofing contractor.

Roof welders typically make a little more than your average worker. But in all fairness I don't think anyone here can answer your question accurately, maybe your best bet would be to show your plans which should include roof drawings and steel sizes to a builder or roofing contractor.

What Rimmer said is correct. Installation cost involves not just actual labour, but lifting equipment, cutting, splicing and welding equipment and consumables.

A good contractor will also use dye to check on quality of welds.

Sister -in -laws new house started about 9 months ago.

Single storey

12m x 6m

Labour cost to

Dig 15 holes and put in 15 precast reinforced concrete pillars

Cut weld and fit roof structure and paint

Tile with cement fibre type tiles

17,000 Baht plus food plus whiskey

What kind of cross beams tie the 15 concrete pillars together?

Trogers

The roof structure is welded to the reinforcing bar at the top of the pillars.

Seems to be the way they do it here.

The job is not top-notch, could have done with an extra coat of the protective paint and the pillars are not at exact 90 degree angles to each other. The walls have been built now and as they've not taken that into consideration the rooms are a bit out of square.

The actual roof structure and welds seem pretty good though.

The roof structure is welded to the reinforcing bar at the top of the pillars.

Such a structure is an engineer's nightmare.

Proper joints should be a steel plate bolted and grout to the top of the pillars and the roof structure welded to this plate. Not welding a steel member to filmsy rebars.

The roof steel structure is uses as a cross beam (the triangular frame) tying 3 pillars together in Y-axis direction. But the the X-axis direction of 5 pillars has no cross beam tying them rigidly. Come a strong gust of wind in this direction can shear the joints of the pillars and roof structure and the roof and pillars will collapse.

Such a roof design is that of a shed, and not one for a house.

In this case the triangular frames are connected at the ends, middle and apex by welded steel sections. So all pillars are connected on both axes.

I think that the pillars are precast to order and there is an extra rebar about 12mm and shaped like candy twist

As we know building standards are not the same here in Thailand as in the west.