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Q1— Section header —
1.1Indicate whether the following statements are TRUE or FALSE. Choose the answer and write only 'true' or 'false' next to the question number (1.1.1
1.1.5\ the ANSWER BOOK.
1.1.1Clear span is the distance along the bottom cord between the truss ends (heel\
1.1.2A c ompetent person is a person who is qualified by training and experience to design, erect, manufacture or inspect a roof structure.
1.1.3Bay spacing is the distance between the centres of two of the same elements.
1.1.4Gable is when the end of the building is vertical, the same shape as the truss es usually constructed of brick work.
1.1.5
1.2Name FIVE different types of trusses that are used to construct roof. (5\
1.3Give another name for each of the following:
1.3.1Top chord
1.3.2Slope
1.3.3Binder
1.3.4Tie beam
1.3.5
1.4Choose a n item or words from COLUMN B that match es a description in COLUMN A. Write only the letter (A G\
1.4.5\ the ANSWER BOOK. COLUMN A COLUMN B halk line ip saw pirit level
Q2— Section header —
2.1Give a brief description of the following roof structures:
2.1.1Mono pitch roof
2.1.2Flat roof
2.1.3Gable to gable roof
2.1.4
2.2Define the term rational design (2\
2.3
2.4
2.5What are the basic functions of a roof? (2\
2.6What influences the spacing between trusses? (1\ 12020122\ NC380 (E\
2.7Complete the following paragraph by using the words in the list below. Write only the word(s\ next to the question number (2.7.1
2.7.10\in the ANSWER BOOK. ouble; top chord; slope; braces; strong; damage; bottom chord;
3.1Make a neat sketch of a HOWE truss and clearly label the following
3.1.1The eaves
3.1.2The overhang
3.1.3The pitch
3.1.4The king post
3.1.5The webs/struts
3.1.6The run
3.1.7The rise
3.1.8The queen post
3.1.9The tie beam span
3.1.10The apex
3.1.11
3.2The steps needed to be followed when assembling a HOWE roof truss are listed below in their incorrect sequence. Rearrange these steps by writing only the answer next to the question number (3.2.1
3.2.12in the correct order in the ANSWER BOOK.
3.2.1Lay the rafter on top of the tie beam and the king post. Mark and cut the top plumb cuts.
3.2.2Lay the queen posts on top of the tie beam and rafters. Mark and cut them to the correct size.
3.2.3Lay the tie beam on the setting out template.
3.2.4Join the struts to the tie beam and the rafters with 100 mm nails.
3.2.5Turn the truss over and clinch the nails on the other side.
3.2.6Mark off the tie beam and cut it to the correct size.
3.2.7Join the rafters to the tie beam and king post with 100 mm nails.
3.2.8Drill holes in the centre of the joints and bolt them together with the bolts and washers.
3.2.9Join the queen post to the tie beam and rafters.
3.2.10Lay the king post on the template on top of tie beam and cut it to the correct size at the apex.
3.2.11Join the king post to the tie beam with 100 mm nails.
3.2.12Lay the struts on top of the tie beam and rafters. Mark and cut them to the correct size. (12 1\ (12\ [25]25
Q4— Section header —
4.1What are the functions of struts or webs in a roof truss? (2\
4.2STATE TWO places on the roof where it is permissible to start with the erecting of trusses. (2\
4.3Describe a tilting batten and say where on a roof it is fixed. (3\
4.4Calculate the rise of the truss if the pitch of the roof is 30 and the tie beam span is 4 500 mm.
4.5State ALL steps to be followed when levelling a wall plate. (11\
4.6The size of wall plates must be in accordance with SANS 10243. List the required sizes for roofs with spanning widths of 10 m, 15 m, and 20 respectively.