LEVEL Sheet Qualification Unit number and title BTEC

LEVEL 3 in Construction and the Built Environment –
QCF BTEC ASSIGNMENT BRIEF
Assignment
Front Sheet

Qualification

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Unit number and title

BTEC Level 3 – Diploma in Construction and Built
Environment (120 credit)

Unit 6: Building Technology in Construction

Learner name

 
Assessor name

Kieron
Howlett

Steve
Malone

Internal Verifier

 Date Verified

 
David Dickins
 

 04/09/2017

Date issued

 Hand in deadline

Submitted on

27/09/2017

 20/10/2017

20/10/2017

 

 

Assignment 2

 
Superstructure
 
 

In
this assessment you will have opportunities to provide evidence against the
following criteria.
Indicate the page numbers where the evidence can be found.

 

Criteria
reference

To
achieve the criteria the evidence must show that the learner is able to:

 

Task no.

 

Evidence/Achieved

P5

Explain
the principles of superstructure design

 

1

 

PAGE:3

P6

Describe
the techniques used to construct and finish the component elements of a
superstructure

 

1

 

PAGE:4,5

M2

Justify the selection of suitable
materials and techniques for use in the construction of superstructures for
low-rise domestic and commercial buildings, for two different tutor-specified
scenarios

 

2

 

PAGES:6,7

D2

Evaluate the environmental
performance of modern materials and techniques used in the construction of
superstructures for low-rise domestic and commercial buildings, for two
different tutor-specified scenarios.

 

2

 

 

The Student must
sign below to acknowledge receipt of this brief. Once signed, the tutor must
comply with the awarding body rules regarding feedback during the assessment
process.
                    [email protected]                                        20/10/2017
Signed:
……………………………….………..……………………..        
Date: ………………………………..

 

 

Assignment
2

Superstructure

Assignment Learning outcomes:
 
·        
Understand
the techniques used in the construction of superstructures for low-rise
domestic and commercial buildings.
 

Scenario:
Leading
on from Assignment 1, you have been asked to write a further report that
explains the principles of superstructure design.

Task 1:

 
1.       
A client
requires a design for a home extension. Explain the principles of
superstructure design to the client. P5
 
          
During the process of producing the extension design the client asks
about the
          
finishes and the methods of construction proposed for the roof and
walls.
          
Write a short explanation for the client. P6

Task 2:
 
2.   
The following
is proposed for the extension:
 
·        
Three layer
felt built up flat roofing
·        
305mm width
brick and block cavity walls with full cavity fill insulation.
 
          Justify the selection
of suitable materials and the techniques proposed. M2
          Explain what types of
insulation are not suitable for full cavity fill. Ensure the use
          of these proposed
materials for the wall and roof and explain how their use impacts
          on the environment. D2

Learning Outcomes Evidence Checklist (What you must
submit to meet specific Learning Outcomes)

tick boxes

For P5,
you must be able to explain the principles of superstructure design. This
should convey an understanding of the underlying principles that influence
the design, such as the external envelope’s need for weather resistance, and
knowledge of the elements that make up a building. The form of evidence could
be as for P4.

 

For P6,
you must  describe the techniques used
to construct and finish the elements of various forms of superstructure for
low-rise domestic and commercial buildings. This should include traditional,
timber-framed, steel-framed and concrete-framed buildings. The form of
evidence could be as in P4.

 

For M2,
you are required to justify the selection of materials and techniques for use
in the construction of superstructures for low-rise domestic and commercial
buildings for two tutor-specified scenarios. This should include all the elements
described in the unit content and the methods used to assemble these elements
to produce the specified buildings.

 

For D2,
you must evaluate the environmental performance of modern materials and
techniques used in the construction of superstructures for low-rise domestic
and commercial buildings, for two different tutor-specified scenarios.

 

 

 

 

 

P5 – The principles of superstructure
design

The
definition of a superstructure is a shell that sits on top of the sub structure
which forms the outer envelope of the building (A structure which is placed
onto another structure). These are the main principles of a superstructure;

–           Internal openings, such as; Hatches,
doors, etc…

 –          Upper
floors, such as; balconies, landings, etc…

–           Frame, such as; Roof beams,
loadbearing framework floors, roof trusses etc…

–           Roof, such as; the drainage, the structure, coverings, features,
sky lights etc…

–           Stairs which connects all the floors
together.

–           Openings, such as; Windows, doors,
vents, etc…

–           Internal walls, such as; Balustrade,
partitions, moving room sliders, cubicles, etc…

–           External walls; enclosing the walls.

All these
different principles allow the building to become weather/air tight. This makes
the building ready for occupants.

 

 

 

 

 

 

 

 

 

 

P6 – The techniques used to construct
and finish the component elements of a Superstructure.

 

Once the
superstructure has been erected the finishes and can be decided. These are
non-structural and are usually decided with the client as there will be a cost
involved depending on the choices made.

 

The finishes
will be required on the following;

–           Flooring; Different types of flooring
such as carpet, hardwood flooring, ceramic tiles, laminate flooring, marble
flooring, etc…

–           Cleanliness; Keeping the room
sterile, tidy, clear, etc…

–           Fashion/Aesthetics;
Smart, designed, different cabinets/furniture, authentic/unusual.

–           Fire resistance; Different types of
cladding surrounding the room, fire resistant paint, using materials for
furniture that are not flammable.

–           Sound resistance; sound resistant
plasterboard, curtains, windows, doors, floor, etc… if required.

–           Health and safety; smooth/gripped
finishes, double glazed windows, no trip hazards, controlling the temperature,
etc…

–           Function; Waterproofing in the bathrooms/kitchens.

–           Colour; some areas are in
conservation areas and the buildings cannot be painted in certain colours.

 

 

 

 

The method
of how the external walls, internal walls and roof are detailed below;

External walls – the most common design is cavity
walling. This is simply either a two brick walls built parallel to each other
with a gap (cavity) between them. The type of design helps prevent the outside
elements from penetrating into the house with the cavity usually filled with
insulation to help retain the heat inside the house.

The other form is similar to two
brick, but with the inner wall be constructed out of wood. The benefits are
that you can have a waterproof proof house within days. The wood is covered in
a breathable membrane to prevent water/moisture from penetrating the house. The
outer wall (brick) does the same job as with the two walls. However, the cavity
this time is placed within the timber frame, not in the cavity itself.

Roof – will be constructed using wood
trussed rafters with diagonal braces, steel straps and noggins. The concrete
tiles will be laid on wooden battens. Behind the batters will be a breathable
membrane and between the rafters celotex will be laid.

Internal walls – will be constructed dependant on whether they are structural or not. If
they form part of the structure the wall will be constructed using brick or
blockwork. These will then be covered in plasterboard and then a plaster skim.
However, if brick has been used the client may wish that the brick work is left
exposed. If the wall is non-structural then
the wall will most certainly be built from timber or metal. Both will be
classed as a stud wall. These are erected quickly with plaster screwed to the
timber/metal and then a skim applied on top. A benefit with both is that
noggins can be placed at specific locations where fittings, radiators for
example, will be hung.

 

 

M2 – The selection of suitable
materials and techniques for use in the construction of superstructures for
low-rise domestic and commercial buildings, for two different tutor-specified
scenarios

 

Flat Roof

A flat roof
can last up to 20 years if they are constructed properly, and are ideal for
small extensions to existing buildings. They are also extremely cheap compared
to standard pitched roofs. It may also be found that planning approval will not
be granted to the extension if it was proposed with a pitched roof due the blocking
the neighbours light.

The flat roof will be covered in
three layers of bitumen felt. These will be applied with a hot flame (blowing
lamp). The layers typically consist of a vapour control layer, 2mm reinforced
felt layer and a 4mm felt layer called a cap sheet. The cap layer can come in
different finishes dependent on the client’s requirements. Each layer is
effectively welded together with the blowing lamp forming a waterproof seal
between each layer and the plywood which the felt is protecting. An aggregate
is usually applied once the three layers have set. This helps protect the felt
and increases its life span. For this build and the above reason this type of
roof is ideal for those with a small extension and small budget.

 

A 305mm width brick and block cavity
wall

A 305mm
width brick and block cavity wall is the most common wall used for domestic
dwellings. This type of wall (with a cavity) ensures that it will comply with
building regulations and offer the best resistance to heat loss. With this
proposal, the cavity is to be filled with insulation that will greatly increase
the effectiveness in not losing heat.

 Because this type of wall has been constructed
since the early 1930s it is a tried and tested construction method of building
a wall with the homes still standing strong. Another benefit is most, if not
all builders know how to build this type of wall and therefore costs should not
be abnormally high. The external walls will also form part of the
superstructure taking the forces and loads from the above. To construct this type of wall
the internal leaf with metal wall ties being placed and strategic points.

Once the
inner leaf is up to a specified height the outer leaf is to construct with the
metal ties locking the two walls together. The insulation will be placed in the
cavity during the construction phase eliminating the potential of any gaps
being left that will create cold spot

 

 

 

 

 

 

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