Abdulwastecx's Posts

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 9:55am On Nov 07, 2015*

[quote author=Dieumerci post=39766650][/quote]Don't use malina wood for roofing o.
Milina wood is good for furniture work but for bad for roofing
The problem with malina is poor tensile stress perpendicular to its axis. It break easily when you load it or when the carpenters are still work on it. It is risky to work with and not that durable over a long period of time.

The best roofing truss wood is apuntu (igbo name) or ayin (yoruba) or iron wood in pidgin.

All type of wood need to be treated to guide against future deterioration

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 9:10am On Nov 07, 2015

Miscellaneous:
Sorry to disturb u on this again. Do u mean in actual construction? Because in the sketched roof plan , I cannot see tiebeam …… please help.

From the plan view.... What I drew there is the tie beam layout

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 8:11pm On Nov 06, 2015

brabus:
It has never worked. Our mind has been programmed here to reject alternative offerings. I can show you hundreds of estates with all these amenities and yet they have tank over their roofs and boreholes.

May be when people realized how dangerous most of the polluted underground water is.... The they will embrace alternative

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 8:09pm On Nov 06, 2015

mufutau55:
I am not even sure in my lifetime if we will get there.... all the places I have my properties, there are no running water anyway and no adequate electricity; so what makes you think we even get to that point you are talking about. Not be Naija we dey talk about?
I am not waiting for that o.

Hajji M.

I'm optimistic we will get there soon.
Central savage system
Pipe born water and domestic cooking gas will be accessible to most home soon

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 8:06pm On Nov 06, 2015

mufutau55:
I am not even sure in my lifetime if we will get there.... all the places I have my properties, there are no running water anyway and no adequate electricity; so what makes you think we even get to that point you are talking about. Not be Naija we dey talk about?
I am not waiting for that o.

Hajji M.

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 8:06pm On Nov 06, 2015

EgunMogaji:
So fellow builders I have a question.

Do you even include any plan to have water and sewer pipes going out to the street in the hopes that there might be connection to city services in the future?

Have we totally given up then?

Private investments in amenities like pipe born water is the future of real estate investment.
Imagine a scenario where there is a water provider in an estate, supply water through metered pipe to every household at a very reasonable price. Capital outlay of borehole, over head tank will be reducedl

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 8:01pm On Nov 06, 2015

EgunMogaji:
Wow...very nice, where is this?
I estimate N1million wasted for waste and water supply system

Suleja Niger state. A town in Niger state close to Abuja

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 7:32pm On Nov 06, 2015

EgunMogaji:
So fellow builders I have a question.

Do you even include any plan to have water and sewer pipes going out to the street in the hopes that there might be connection to city services in the future?

Have we totally given up then?

Where I live.... There is a constant water supply. We don't even have borehole or overhead water tank

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 7:15pm On Nov 06, 2015

Miscellaneous:
Please in your number 3 rule, spacing between wat?

Between the tie beam

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 12:42pm On Nov 06, 2015

PeoplesArmy:
This looks complex. Please simplify the two formulars for ordinary folks.

See this simple one

Pics 1: diameter container
Pics 2 :height of container
Pics 3: simple calculation

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 9:57am On Nov 06, 2015

Miscellaneous:
hey man. thanks for the sketch. But how do u determine the shape of the roof from a house plan? I was making a house plan in autocad & I wanted to overlay the roof plan but I was stuck cos I don't know how to deterimine the ridges & other components of the roof… In your sketch, how did you come about such design of the roof even?

Here are some tips for hip roof.
Shape of the roof is govern by shape of the floor plan, size of the plan etc.
Rule 1. Your ridges/gutter(valley) must all be parallel and must be at angle 45 degree to the building corners

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 9:18am On Nov 06, 2015

Miscellaneous:
These drawings what were they done with? Autocad?

With Autocad I

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Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 9:44pm On Nov 05, 2015

lastpage:
How is this one better, in terms of "aesthetics" than the overhead concrete one?

This is even uglier, wastes "ground" space and the "stands" liable to rust and therefore collapse earlier, that the overhead concrete type.
It is also costlier.
Pressure is dependent on "Height above ground", (or exit of tap) so for same height, Pressure is same, whether stand alone or not
Capacity is a function of size of tank and[b] you will have same capacity[/b], if you use same tank size, irrespective of whether it is stand alone or not.
I agree that capacity translates to "weight" but you will also agree that "achievable capacity/weight" is also a factor of the "Iron stands" used in a stand alone type otherwise, it will crumble. If you make good Iron stands, then you can equally make a strong concrete deck (with appropriate columns/beams) along with your building

Anyway, each man to his own.

Lastpage!

Cost is the only advantage that tank placed on decked platform have over overhead tanks stand.

Space is not really a problem because the stand can be sited on a 2.1m c 2.1m plan.

The location can be at the back of the house closer to underground water source (bore hole). Most people consider the one mounted on top of the house ugly because it affect the floor of the roofing because some part of the roofing will need to be opened for such deck.

Steel structures carrying axial gravity land have more capacity than reinforced concrete structure. Such a steel platform can easily be built to carry a very large load than can't be achieved with a decked platform.

Pressure(head) increase with height, a tank on a decked platform will supply water to the upper part of the house of two storey building of say 3m per floor at a much lower head(pressure) than an over head tank of 8m high.

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 8:19pm On Nov 05, 2015

Installation of roofing sheet.
Roofing sheet type :stone coated tiles

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 7:23pm On Nov 05, 2015

Dieumerci:
I learned from this great properties section that when you use a mix ratio of 1:6 to get mortar for block setting.
It means 1 bag of cement to 12 headpan of sand.
Is there a way one could get to know the tonnage of that 12 headpan of sand?

Yes, there is a way... All you need to know is the density of the sand that you are using, the physical dimensions of the bucket or head pan used for the mix.

By following this simple procedure.
Get the diameter of the head pan or bucket
Get the height of headpan or bucket
Calculate the volume using nhd2/4
From the density, p=m/v... Get the m(mass)
Finally divide the mass in kg by 1000 to get the tonnage

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 7:10pm On Nov 05, 2015

EgunMogaji:
It shouldn't be cheaper than concrete but it sure looks more befitting.

Brabus is teaching me to not "think of cost but value"

It's also secure because it won't be easy to access to pour nefarious chemicals in it and make everybody fall asleep in the compound. They they'll blame it on Juju after the robbers leave.

The free standing steel overhead tank is the best over a long period of time.

Little maintenance cost
You will get adequate pressure
Capacity is high and you don't need to worry about your building

Properties › Re: General Topic Thread-To Discuss Anything And Everything in Building Construction by abdulwastecx(m): 3:22pm On Nov 05, 2015

Dieumerci:
What are the advantages and disadvantages of having a water storage tank on a decked platform in the roof of a building?

Advantage
1.lower cost of platform, since it will placed on a decked part of the house which will not require the normal steel platform

2.lower cost of piping water from the tank to various part of the house

Disadvantages
1. Limited head (pressure) especially for higher building, the building at the top floor may lack the necessary height to provide pressure.

2 structural failure of building when not properly done. Since water in the tank will add considerable amount of load to the structural members that support it (slab, beams, columns and footing). If these members are not adequately design to carried the load, there may be excessive settlement or total collapsed of that part which may also affect other part of the building.

3. It impaired esthetics: having a big tank on top of the house may not really be good to the beauty of the house. This tanks may also lick to the floor there by causing paint to fall off etc.

4. It also limit the capacity of such tanks since the capacity will depend on the structural integrity of supporting structural members

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 10:42am On Nov 04, 2015

smiley001:
Nothing to say.

Weldone Prof.

Thanks sir.... I'm a learner oooo

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 10:38am On Nov 04, 2015

spyder880:
Very detailed, I like this roof. Good work.

Thanks sir.... From the veteran itself

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 7:04pm On Nov 03, 2015

EgunMogaji:
Locked and loaded.

I like how you guys do your thing by interjecting new ideas into your work.

Thanks sir..

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:57pm On Nov 03, 2015

Here is the front view of the roof

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:53pm On Nov 03, 2015

Here is the finished roof truss

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:49pm On Nov 03, 2015

Finally, the roof connector is attached to the roof truss through the tie beam

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:46pm On Nov 03, 2015

Next: nailing of purlin. The purline spacing is a function of the type of roofing sheet used.
For stone coated roofing sheet = spacing of 14 1/4'' or 14''
for aluminum long span step = 450mm
for long span plain roofing sheet = 900mm

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:41pm On Nov 03, 2015

the next step is the brazing of the rafter. The rafter braze is spaced at 5ft center to center.

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:40pm On Nov 03, 2015

After all the king post have been placed and brazed through the help of builders plumb, the rafter are then nailed.
It is important to always start the hanging of rafters from either the ridge or valley.
this ridge/valley is then braced both laterally and vertically through the use of line.
A line is then connected between two ridge or between ridge and gable to serve as a level line used to control all other rafters in between

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:33pm On Nov 03, 2015

Due to the complexity of the roof, the height of building vary from the widest side to the narrowest side. Here are of the examples of such differences in height

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:31pm On Nov 03, 2015

here are the tie beams

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:27pm On Nov 03, 2015

step; Determination of roof height = highest king post
the highest king post is determine using simple ''hypotenuse theorem"
assume height =h
length of the longest side = L

solution, the opposite = h, adjacent = L/2
I wanted to use a vertical slope of 35degree ( because i wanted a simple and medium high roof)
h = L/2 x tan 35 = 19ft ( note , L/2 = 27'2'')

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Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:21pm On Nov 03, 2015

General roof properties:
1. number of inter corners (gutter, valley) =7nr
2. number of external corners ( ridges ) = 11nr
3. the longest dimension across a potential king post = 16.54m

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:14pm On Nov 03, 2015

bill of quantities for the roof truss work
2"(50mm) x 4" (100mm) hard timber for rafter, brace, king post and tie beam about 800nr
2" (50mm) x 3" (75mm) hard wood for purlin of about 1200nr
2"(50mm) x 2" (50mm) for noggin

Properties › Re: Simple Guild To The Construction Of Timber Roof Truss In Nigeria by abdulwastecx(op): 6:10pm On Nov 03, 2015

here some general information and properties of hip roof ( German roof).
1.All the ridges and valleys (gutter) should be at 45 degree to the edge of the building
2.All the ridges and valleys (gutter) should be parallel to one another.
3. A reasonable spacing of 1.2m (4ft) should be adopted.

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