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MEP-Technical Manual CDN 0408.qxd - Hambro

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METRIC<br />

JOIST DEPTH SELECTION TABLES<br />

Concrete: f’ c = 20 MPa; density = 2 400 kg/m 3<br />

Joist spacing = 1 220 mm<br />

Slab thickness =150 mm<br />

Residential Office Other Loading<br />

Building Building (LL=4,8 kPa)<br />

Dead Load (kPa) 4.36 4.36 4.36<br />

Live Load (kPa) 1.92 2.40 4.80<br />

Total Load (kPa) 6.28 6.76 9.16<br />

SPAN c/c (mm)<br />

3 600<br />

4 300<br />

4 900<br />

5 500<br />

6 100<br />

6 700<br />

7 300<br />

7 900<br />

8 550<br />

9 150<br />

9 750<br />

10 350<br />

10 975<br />

11 575<br />

12 200 *<br />

13 100 *<br />

MDH200 MDH200 MDH300<br />

min = MDH200 min = MDH200 min = MDH200<br />

MDH250 MDH300 MDH300<br />

min = MDH200 min = MDH200 min = MDH200<br />

MDH300 MDH300 MDH350<br />

min = MDH200 min = MDH200 min = MDH200<br />

MDH300 MDH350 MDH350<br />

min = MDH200 min = MDH200 min = MDH200<br />

MDH350 MDH350 MDH350<br />

min = MDH200 min = MDH200 min = MDH200<br />

MDH350 MDH350 MDH400<br />

min = MDH250 min = MDH250 min = MDH250<br />

MDH350 MDH400 MDH400<br />

min = MDH250 min = MDH250 min = MDH250<br />

MDH400 MDH400 MDH400<br />

min = MDH300 min = MDH300 min = MDH300<br />

MDH400 MDH400 MDH500<br />

min = MDH300 min = MDH300 min = MDH300<br />

MDH500 MDH500 MDH500<br />

min = MDH300 min = MDH300 min = MDH300<br />

MDH500 MDH550 MDH500<br />

min = MDH350 min = MDH350 min = MDH350<br />

MDH550 MDH550 MDH550<br />

min = MDH350 min = MDH350 min = MDH350<br />

MDH500 MDH500 MDH550<br />

min = MDH400 min = MDH400 min = MDH400<br />

MDH550 MDH550 MDH550<br />

min = MDH400 min = MDH400 min = MDH400<br />

MDH550 MDH550 MDH550<br />

min = MDH450 min = MDH450 min = MDH450<br />

MDH550 MDH550<br />

min = MDH500 min = MDH500<br />

* Permanent line of cross bridging shall be installed at mid-span.<br />

MDHXXX<br />

: Optimal MD2000 ® Series Joist Depth (mm)<br />

min = MDHXXX : Minimum Depth (mm) Allowed<br />

7

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