Fabtid Project and Investment Ltd

26/08/2024

06/07/2021

Production of paint

06/07/2021

Construction stage

06/07/2021

06/07/2021

Elementary stage of a project executed

23/10/2020

• How to Calculate Timber roof members
A home is gotten when you look for comfort based on your fantasy, but a shelter is a necessity, and a building becomes a shelter when it can prevent rain,water,sun, strong wind and other climatic elements from affecting the occupants- human,animal,live and dead loads with personal effects.
As far as I am concerned the moment you have your roof placed on a building, other things are important but they are basically needs. You can’t move into a house without a roof , but we have seen people living in a house with no window or makeshifts windows covered with ordinary bags and cardboards.
Wood/ timber are sawn into various sizes amongst are
2” by 2” i.e 50mm by 50mm
2” by 3” i.e 50mm by 75mm
2” by 4” i.e 50mm by 100mm
2” by 6” i.e 50mm by 150mm
3” by 4” i.e 75mm by 100mm
3” by 6” i.e 75mm by 150mm


What determines the quantity of wood needed depends basically on the height of the roof, how complex the roof is? Which may leads to lots of offcuts e.t.c
To determine the roof members you need to have the floor plan, the section and the roof plan.


From the section a-a above you can see the height of the roof of building and the length and breadth of building is already showned in the floor plan, so left to be knowned is the rafter or the fall ‘x’ as shown in diagram above.
Remember the Pythagoras theorem in secondary school days used in calculating the longest part of a right angle triangle.
The numbers of wood to be calculated also depends on spacing for the purpose of this exercise, we are using the format in diagram above as our specifications for our calculatons.
For ceiling noggins of 600mm centers it simply means the wood are nailed 600mm apart, so add the breadth of plan and 600mm as overhangs both sides i.e 7,800mm or 7.8m +1200mm or 1-2m=9meters
Then divide by 0.6m=15pcs of 16.975m of 50 by 50.
For the longitudinal portion, 16.975+1.2m(the overhangs of 0.6m both sides)=18.175m then divide by 0.6=31

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03/07/2019

Building components with there function and nominal dimensions

02/07/2019

Facts about foundations

31/05/2019

Fabtid project and investiment ltd

What causes foundation failure?

Do you know what makes foundations weaken?
We know what the signs are: cracks in walls and floors; doors and windows that won’t open; stairs that come away from porches; chimneys that separate from the house siding, to list a few.
Houses and commercial buildings usually look very solid. Built with concrete, and beams, it’s hard to imagine what could cause them to crack and shift other than an earth quake.

There are many causes of foundation failure, here are the six main ones

 Soil type – especially expansive clay soil
 Poorly compacted fill material
 Slope failure, mass wasting
 Erosion
 Poor construction, and
 Transpiration
How many of these were you familiar with? We explain a little more about each below.

Soil Type – Expansive Clay Soil
The most common kind of expansive clay can absorb so much water that it can swell by several hundred percent. The pressure from this degree of swelling can easily lift or “heave” most residential homes. Soils expand with moisture and they contract with dessication, causing up and down movements known as differential settlement. To preserve structural integrity of the building, we have to provide underpinning for the foundation.

Poorly Compacted Fill Material
If the fill material on a lot is not sufficiently compacted to support the weight of the structure above it, there will be foundation problems. The problem can be from the mix of odd fill materials, and from poorly compacted fill, or both.
This building developed a wide crumbling crack in the lowest corner of the foundation. It sits on a hillside, and there is a water drainage area on the other side of the house.

Slope Failure / Mass Wasting
Geologists use the term “mass wasting” to describe the movement of earth downhill. It could be “creep” which is slow, or “landslides” which are sudden. Slope failure as we use it refers to “creep”.
Underpinnings can act as a barrier to “creep”, but the power of gravity is such that unless the underpinnings were specifically designed to stop slope failure, warranties can’t usually cover this in sites exposed to slope failure.

Erosion
Erosion may be the most straightforward cause of settlement issues. It can come from poor drainage, uncontrolled water flow or lack of ground cover. If not identified early, erosion can wear away the soil around foundations, creating a new need for underpinning.

Poor Construction
Most towns and cities now have building codes that require soil testing and engineer certification before and during the building process, so poor construction is less and less the cause of foundation failure.

Transpiration
We all know what perspiration is, but transpiration is a less commonly known word. It is the word that describes plants removing moisture from the soil. Trees withdrawing moisture from the soil in the summer can accelerate soil shrinkage in hot summer months. It is the expansion and shrinking or contraction of soils that disturb the foundation.

A lot is taking place under the soil, often invisible from the surface. So we need to keep our eyes open to any signs of foundation weakness.