TECHNICAL DETAILS PRECAST SUSPENDED SLABS

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1 TECHNICAL DETAILS PRECAST SUSPENDED SLABS

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3 Precast Suspended Slabs Design solutions Included in this booklet, designers and engineers will find a design guide, load tables, and construction details for Heldenfels Enterprises Inc. precast suspended slab foundation systems. Suspended slab foundations are an excellent design solution for poor soil conditions where issues of shifting, uplift, and differential settlement are of concern or for a condition in which the end-user specifically desires a crawlspace for future flexibility and maintenance. A suspended foundation is placed above the existing material atop piers or piles. The loads applied to the foundation are transferred into the subterranean components through a direct bearing connection or pier/pile caps. This design guide is a resource for designers to assist in meeting these requirements. In addition to these basic design parameters, our precast structural engineers will work with the designer. Sharing our precast design expertise with the Engineer-of-Record not only results in shared responsibility, but also yields superior performance. Construction solutions The Heldenfels Enterprises Inc. system facilitates speed of construction and minimizes trades and site congestion. By fabricating components during site preparation, our system leverages the inherent schedule advantages of precast construction. The ease of installation and all-weather constructability enhances site flow while minimizing quality issues and wasted time resulting in smoother, faster completion. Owner solutions Our system will allow for the design and construction of foundations that demonstrate superior performance. Stringent quality control paired with superior concrete mix design yields a vastly stronger, more durable structure than site cast concrete. Owners prefer our system solutions because they are affordable and reduce schedule risk. Long term owners value the benefits of crawlspace foundations for ease of maintenance and future adaptability.

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5 Load Table Foundation Inverted Tee Beams Span (feet) Section Strand Locations IT34 16,054 11,454 8,754 6,854 5,534 4, total service load (plf) 8@4.5" camber at erection = 18 Strand camber after topping weight final camber before live load 32IT34 14@2.5" 23,647 16,767 12,467 9,867 7,967 6,657 5,647 4,897-12@4.5" = 26 Strand IT37 16@2.5" 33,477 23,677 17,677 13,677 11,077 9,277 7,777 6,657 5,857 14@4.5" @4.5" = 34 Strand Key 1) f'c = 6,500 psi, f'ci = 3,500 psi 2) 2" composite topping w/ f'c = 3000 psi. 3) Strand = 1/2", 270 ksi Lolax. 4) Dead Loads (non composite) Beams = 600 plf, plf, 1023 plf Topping = 25 plf (no overhangs) 5) Superimposed Dead Load (composite system) Double Tees w/ 2" Topping = 72 psf 26IT34 32IT34 36IT37 Office Bldg = 15 psf Industrial = 25 psf Parking = 5 psf 6) Live Loads Office Bldg = 100 psf (reducible) Industrial = 150 psf (non reducible) Parking = 40 psf 7) Approximate DL and LL proportions are: Client PROJECT Office Bldg: DL = 55%, LL = 45% Heldenfels Enterprises, Inc. cks PROJECT No. DATE P /10/2010 BY SHEET ck IT-Beams 5700 IH 35 South, San Marcos, TX 78666, phone, , Heldenfels Enterprises Precast Foundations Notes Industrial: DL = 40%, LL = 60% Parking: DL = 65%, LL = 35% Parking: DL = 65%, LL = 35%

6 Load Table Foundation L Beams Span (feet) Section Strand Locations LB34 12@2.5" 26,787 18,787 13,987 10,687 8,387 6,387 5,437 4,637 - total service load (plf) 10@4.5" camber at erection 6@4.5" camber after topping weight = 28 Strand final camber before live load 32LB34 14@2.5" 43,300 23,600 17,450 13,550 10,800 8,900 7,420 5,940 5,150 12@4.5" @4.5" = 34 Strand LB37 16@2.5" 47,032 33,432 24,632 18,832 15,032 12,232 10,232 8,632 7,432 14@4.5" @4.5" = 40 Strand Key 1) f'c = 6,500 psi, f'ci = 3,500 psi 2) 2" composite topping w/ f'c = 3000 psi. 3) Strand = 1/2", 270 ksi Lolax. 4) Dead Loads (non composite) Beams = 760 plf, 973 plf, 1205 plf Topping = 25 plf (no overhangs) 5) Superimposed Dead Load (composite system) Double Tees w/ 2" Topping = 72 psf 26LB34 32LB34 36LB37 Office Bldg = 15 psf Industrial = 25 psf Parking = 5 psf 6) Live Loads Office Bldg = 100 psf (reducible) Industrial = 150 psf (non reducible) Parking = 40 psf 7) Approximate DL and LL proportions are: Client PROJECT Office Bldg: DL = 55%, LL = 45% Heldenfels Enterprises, Inc. cks PROJECT No. DATE P /10/2010 BY SHEET ck L-Beams 5700 IH 35 South, San Marcos, TX 78666, phone, , Heldenfels Enterprises Precast Foundations Notes Industrial: DL = 40%, LL = 60% Parking: DL = 65%, LL = 35% Parking: DL = 65%, LL = 35%

7 Load Table Foundation R Beams Span (feet) Section Strand Locations RB31 8@2.5" 19,870 14,270 10,820 8,570 7,020 5, total service load (plf) 8@4.5" camber at erection 6@4.5" camber after topping weight = 20 Strand final camber before live load 22RB31 10@2.5" 24,399 17,349 13,049 10,250 8,349 7,029 6, @4.5" @4.5" = 28 Strand RB31 12@2.5" 28,229 20,029 15,029 11,779 9,529 8,049 6,759 5,929-12@4.5" @4.5" = 32 Strand RB37 14@2.5" 42,922 30,322 22,722 17,722 14,272 11,822 10,022 8,622 7,552 14@4.5" @4.5" = 40 Strand Key 18RB31 22RB31 26RB31 32RB37 Office Bldg = 15 psf Heldenfels Enterprises, Inc. Client PROJECT cks PROJECT No. DATE P /19/2010 Heldenfels Enterprises Precast Foundations BY SHEET ck R-Beams 5700 IH 35 South, San Marcos, TX 78666, phone, , Notes 1) f'c = 6,500 psi, f'ci = 3,500 psi 2) 2" composite topping w/ f'c = 3000 psi. 3) Strand = 1/2", 270 ksi Lolax. 4) Dead Loads (non composite) Beams = 581 plf, 710 plf, 840 plf, 1233 plf Topping = 25 plf (no overhangs) 5) Superimposed Dead Load (composite system) 8" Hollowcore w/ 2" Topping = 82 psf Industrial = 25 psf Parking = 5 psf 6) Live Loads Office Bldg = 100 psf (reducible) Industrial = 150 psf (non reducible) Parking = 40 psf 7) Approximate DL and LL proportions are: Office Bldg: DL = 55%, LL = 45% Industrial: DL = 40%, LL = 60% Parking: DL = 65%, LL = 35% Parking: DL = 65%, LL = 35%

8 Load Table 10DT24 Foundation Double Tee Span (feet) # of Strand Strand Locations @2" @4" @6" @ @4" @6" @10" @2" total service load (psf) 2@4", 2@6" camber at erection 2@10" camber after topping weight 2@12" final camber before live load 12 2@2", 2@4", @6", 2@8" @10" @12" Key 1) f'c = 6,000 psi, f'ci = 3,500 psi 2) 2" composite topping w/ f'c = 3000 psi. 3) Strand = 1/2", 270 ksi Lolax. 4) Dead Loads (non composite) Double Tee = 47 psf 2" Topping = 25 psf 5) Superimposed Dead Load (composite system) Office Bldg = 15 psf Industrial = 25 psf Parking = 5 psf DT Cross-Sectional Area = 452 in 2 6) Live Loads Office Bldg = 100 psf (reducible) Industrial = 150 psf (non reducible) Parking = 40 psf Client PROJECT cks PROJECT No. DATE 7) Approximate DL and LL proportions are: P /26/2010 Office Bldg: DL = 55%, LL = 45% Heldenfels Enterprises Precast Foundations BY SHEET Industrial: DL = 40%, LL = 60% ck 10DT24 Parking: DL = 65%, LL = 35% 5700 IH 35 South, San Marcos, TX 78666, phone, , Heldenfels Enterprises, Inc. Notes

9 Span (feet) # of Strand Strand Locations @2" @4" @6" @ @4" @6" @10" @2" total service load (psf) 2@4", 2@6" camber at erection 2@10" camber after topping weight 2@12" final camber before live load 12 2@2", 2@4", f'ci > 3500psi required 2@6", 2@8" @10" @12" ) f'c = 6,000 psi, f'ci = 3,500 psi DT Cross-Sectional Area = 452 in 2 Topping Thickness = 2 in Heldenfels Enterprises, Inc. ck/jt 10DT24-2" Notes

10 Span (feet) # of Strand Strand Locations @2" @4" @6" @ @4" @6" @10" @2" total service load (psf) 2@4", 2@6" camber at erection 2@10" camber after topping weight 2@12" final camber before live load 12 2@2", 2@4", f'ci > 3500psi required 2@6", 2@8" @10" @12" ) f'c = 6,000 psi, f'ci = 3,500 psi DT Cross-Sectional Area = 452 in 2 Topping Thickness = 3 in Heldenfels Enterprises, Inc. JT 10DT24-3" Notes

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