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CONCRETE TECHNOLOGY CORPORATION � <br /> 12'/:" HOLLOW CORE SLAB <br /> HS20-44 <br /> ,z <br /> ii <br /> � <br /> O io <br /> 2 3 <br /> � <br /> LL y <br /> U <br /> a <br /> � --- #� = Number of Filled Voids reyuired <br /> � 8 O for 2'-0"at each end of each slab. <br /> II Z <br /> J <br /> � � 1 <br /> �� Venl Nolcli <br /> F `` <br /> = 6 � <br /> � �'� 11 Strands <br /> W ` <br /> � � <br /> O 5 '. <br /> U �. \ ��11 Strands (ys,,,i = 135 pc� '. <br /> J �� <br /> O q � <br /> y � . <br /> LL � <br /> Q �'a„ . <br /> F— 3 ` `� <br /> 2 <br /> (7 <br /> w Z <br /> x <br /> Knee <br /> � 5 WO��� , <br /> o - <br /> 14 16 18 2D 22 24 2G 28 30 32 34 36 38 <br /> SIMPLE SPAN (ft) <br /> GENERAL NOTES: <br /> 1.)A minimum cover depth of six inches OR a three inch thick cast in place concrete topping slab is required. <br /> 2) Simple Span is centerline ol bearing lo centerline ot bearing. <br /> 3)The Knee Wall envelope represents the maximum span and height ot soil cover lhat wn be suppoAed by slabs <br /> with slandard notches for manhole openings, assuming void fill concrete fc= 3,000 psi. Poinls talling outside this <br /> envelope require knee walls to support the slabs at manhole openings. <br /> 4.) Interpolalion belween slrand conlours is acceptable. DO NOT extrapolale beyond the bounds of this chart. <br /> 5.) Soil cover is assumed to be uniform. <br /> 6.) Except as noled, soil cover unit weight is assumed to he 120 pcf. <br /> 7.) Minimum span length= 14'-0". <br /> 8.) The val�es shown on this chart are in cumpliance with IBC 2003 8�CI 318-05. <br /> 9.)The Venl Notch envelope represents ttie maximum span and heighl of soil cover that can be suppoAed by slabs <br /> with 6Y:'standard notches in adjacent slabs to accommodate 12"diameter vents, assuming void fill concrete Tc= <br /> 3,000 psi. Refer lo Detaii 3 on page 15 01 this brochure for vent notch details. <br /> znaioe MnNUfACTURERS OF PRESIRESSED CONCRETE • T6�COMA, WASHINGTON 7 !I�� <br /> � <br />