Dear Customer:

We would like to thank you for your interest in our precast concrete  Bunker Silos.  Our company has been building Bunker Silos for over 35 years.

We offer two heights, 8 ½’ and 12’ high.  Our 8 ½’ high walls come in two styles.  The L-Panels are used for the outside walls and they are bolted together.  The 8 ½’ T-Panels can be used for an outside wall or an inside wall.  Our 12’ high walls are all T-Panels which can be used for an outside wall or an inside wall.  The 12’ high walls are bolted together with the bolts being recessed so there would be no damage to your equipment, (an exclusive feature of Al’s Concrete Products).  We have radius corners at the top of all our Bunker Silo walls to eliminate the chance of tearing the plastic cover when the Bunker Walls are wrapped.  Also our 12’ high walls are constructed of solid concrete (no voids).

In our manufacturing process, we are able to achieve strengths of 7500 P.S.I. using self consolidated concrete.  The additive we use reduces the amount of water to make the concrete flowable.  We also use a grade 60 #5 rebar for our primary reinforcing and we use structure fibers for our secondary reinforcing.

The concrete or blacktop floor is poured up to the base of the panels after the walls are installed.  The Bunker Silo walls can also be set on your existing concrete or blacktop pad.  The precast concrete Bunker Silo walls are designed to be freestanding. (They don’t need any outside supports).  They are also designed to take earth pressure from the outside so they can be installed into a hillside.

Attached are recommendations for site preparation.   If you would like any more information, please feel free to call.  

Sincerely,  

Charles Wieser

From our experience of installing bunker Silos for over 35 years, there should be a minimum of  1/2 % to 2% slope on the Bunker site.  We recommend using a 1" to 2" diameter screen rock or gravel under each wall approximately 8" thick covering a 4" tile line with a gravity outlet.

The reason for this is to keep the soil dry under the wall for better stability and to keep excess moisture and rain water out of the feed so you will be able to achieve a higher quality of feed. 

If you do not use the drain tile we still recommend an 8" compacted gravel base under each wall for stability.  This could vary according to soil conditions.

The site should be rough graded to 1" of final grade. When we come to erect the walls, our crew will do the final grading. The customer will have to furnish AL's Concrete Products, Inc with a skid loader and fine gravel (3/8" or less) to do the final grading.  Click here for printable site preparation document

	STRUCTURAL FEATURES OF THE 8' 6" L-PANEL & T-PANEL Tongue and groove joints sealed with Butyl rope to prevent spoilage Sections bolted together with 5/8" recessed bolts Fast, efficient installation No footing required Manufactured with 6000 P.S.I concrete Reinforced with grade 60,  5/8" rebar and 6 x 6 x 6 ga. mesh Engineered to take the live load of any size tractor for packing silage Printable 8' 6" T-Panel Partition Detail Printable 8' 6" T-Panel
	8' 6" Corner Panel   A stronger one piece corner (interior view) 5' length each way (outside dimension) 8' 6" height
	12' T Panel Also Available Printable 12' T-Panel Spec Sheet Printable 12' T-Panel Corner Detail Primary Reinforcement" Grade 60 Rebar Secondary Reinforcement: Structural Fibers - 5# per Cubic Yard 6000# Concrete Mix Design Panel Length 6' 0" Panel Height 12' 0 "
Get the Precast Advantage
Faster, efficient installation (units frequently in stock ready for immediate delivery) Maintenance on precast products is non-existent Assembly line produced which lowers customer cost versus on-site forming Any length or width desired in 2' 6" increments Units are 5' or 7' 6" long, 8' 6" high Corner units are 5' long, 8' 6" high L-Panels and T-Panels are moveable
Tonnage Table for 8' 6" side walls Tonnage Table for 8' 6" sidewalls     Based on 50lbs per cu. ft (corn silage)    haylage tonnage appx 80% of corn Length 20' wide 22 1/2' wide 25' wide 27 1/2' wide 30' wide 35' wide 40' wide 50' wide 60' wide 60' 240 270 300 330 360 420 480 600 720 70' 280 315 350 385 420 490 560 700 840 80' 320 360 400 440 480 560 640 800 960 90' 360 405 450 495 540 630 720 900 1080 100' 400 450 500 550 600 700 800 1000 1200 110' 440 495 550 605 660 770 880 1100 1320 120' 480 540 600 660 720 840 960 1200 1440 130' 520 585 650 715 780 910 1040 1300 1560 140' 560 630 700 770 840 980 1120 1400 1680 150' 600 675 750 825 900 1050 1200 1500 1800
Structural features of the 12' T-Wall Bunker Silo
Dimensions (as shown in drawing to right) are 6' wide at the base and 6' long and 12' high Sections are bolted together with 5/8" bolts No footing required Any length or width desired in 6' increments Tongue and groove joints sealed with Butyl rope to prevent spoilage  Manufactured with 6,000 P.S.I. concrete Reinforced with grade 60 5/8" rebar and 6 x 6 x 6 ga. mesh Engineered to take the live load of any size tractor for packing silage.
Tonnage Table for 12' Sidewalls Tonnage Table for 12' Sidewalls  Based on 50lbs per cu. ft (corn silage)    haylage tonnage appx 80% of corn Length 30' wide 35' wide 40' wide 45' wide 50' wide 55' wide 60' wide 60' 540 630 720 810 900 990 1080 70' 630 735 840 945 1050 1155 1260 80' 720 840 960 1080 1200 1330 1440 90' 810 945 1080 1215 1350 1495 1620 100' 900 1050 1200 1350 1500 1660 1800 110' 990 1155 1320 1485 1650 1825 1980 120' 1080 1260 1440 1620 1800 1990 2160 130' 1170 1365 1560 1755 1950 2155 2340 140' 1260 1470 1680 1890 2100 2320 2520 1350 1575 1800 2025 2250 2485 2700