one way slab - 15122
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Slabs
One way slab
Span up to 8 m, h ~ l / 26, až 0,30 m
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One way slab
One way ribbed slab
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Two way slab
Span up to 10 m, h ~ lx / 38
Flat slab
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Flat slab
Flat slab
Punching shear
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Two way ribbed slab
Enlarged column heads
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Drop panels
Analysis of slab
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Shear reinforcement
Indicative dimensions of slabs
SlabsSlabs
One way spanning slabs
– simple supported…………….. l1/25 – l1/20 (50 mm)
– continuous and fixed …. . l1/33 – l1/30 (50 mm up to 1 m)
(60 mm up to 1,5 m)
(70 mm obove 1,5 m)
– cantilevered …………… .. l1/10 (50 mm)
hmin
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Indicative dimensions of slabs
SlabsSlabs
Two way slabs
– simply supported……………. l1/33 (100 mm)
– partially fixed ………….... l1/40
- fully fixed … 1,2 (l1 + l2)/105 (100 mm)
hmin
Indicative dimensions of slabs
Two ways lighten (ribbed) slabs
– simply supported……………………. l1/20
– partially or fully fixed ……………..... l1/25
hmin
Locally supported slabs
– flat slab ……………………………. l2/33 (160 mm)
– enlarged heads………………… ... (l2 – 2c/3)/35 (120 mm)
l2 is a greater span, c effective width of the head
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Indicative dimensions of concretebeams
Simply supported and continuous beams
– with imposed loads …………l1/15 – l/112 (0,33 – 0,4) h
– roof … ………….…………………l1/17 – 11/14 (0,33 – 0,4) h
h b
Cantilever beams
– withy imposed loads …………. l/5 (0,33 – 0,4) h
– roof ………………… ………………l/10 (0,33 – 0,4) h
Indicative dimensions of concrete components
Beams
– with imposed loads …… …..l/12 – l/8 (0,3 – 0,5) h
– roofs …………….…… … l/14- l/12 (0,3 – 0,5) h
h b
ColumnsColumns
– middle column of a multistorey building
ydscd
ds ff
NAρ+
= ∑8,0Minimum dimensions:
- 200 mm, cast in situ- 140 mm, prefabricated columns