Onderwysersgids
2.1 Hartlyn as die buitemate van ’n halfsteenmuur gegee word: Hartlyn – buitemate: 2/14 000 2/7 000
= 28 000 mm
= 14 000 mm 42 000 mm
Minus: 4/110
440 mm 41 560 mm
2.2 Hartlyn as die binnemate van ’n halfsteenmuur gegee word: Binnemaat van lang mure
IBinnemaat van kort mure Hartlyn: Plus:
= 14 000 mm – 2(110 mm) = 14 000 – 220 mm = 13 780 mm
= 7 000 mm – 2(110)mm = 6 780 mm
2/13 780 = 27 560 mm 2/6 780 = 13 560 mm 41 120 mm
4/110
440 mm 41 560 mm
Gevolgtrekking: Hartlyne is dieselfde
3.1 Hartlyn as die buitemate van ’n enkelsteenmuur gegee word: Hartlyn – buitemate: 2/20 000 2/12 000
= 40 000 mm
= 24 000 mm 64 000 mm
Minus: 4/220
880 mm 63 120 mm
3.2 Hartlyn as die binnemate van ’n eensteenmuur gegee word: Binnemaat van lang mure
Binnemaat van kort mure
Hartlyn – binnemate: 2/19 560 2/11 560
Plus: 4/220
= 20 000 mm – 2(220 mm) = 20 000 – 440 mm = 19 560 mm
= 12 000 mm – 2(220)mm = 11 560 mm
= 39 120 mm
= 23 120 mm 62 240 mm
880 mm 63 120 mm
Gevolgtrekking: Hartlyne is dieselfde
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