Agricultural Roll Tarp Cover Systems

Safe, durable protection for gravity boxes, roll off bins, silos and greenhouses

Agricultural cover kits, built to last.

Professional solutions for agricultural professionals.

Roll tarp cover kits with self locking crank system for gravity boxes, grain buggies, fertilizer tender/spreaders and roll-off bins

Martarp offers a complete range of roll tarp cover kits for your gravity box, grain buggy or roll-off bin. Pick the one that’s just right for what you need, and we can build and install it for you. We build and install industry-standard cover kit systems for all your agricultural trailers:

Gravity box roll tarp kits

Tender / spreader roll tarp kits

Grain buggy roll tarp kits

Roll off bin cover kits

Coil tarps

Roll tarp cover kit systems installed at our Dundalk, Ontario facility

Shur Lok® self locking side roll / return lock

For big trailers, roll off bins and most agricultural applications

Shur-Co® is the preferred tarp cover system for most agricultural applications. The Shur-Lok® system accommodates grain trailers, farm trucks, silage boxes, fertilizer tenders and spreaders, grain carts and gravity wagons, B-trains, roll off bins and various construction applications. Galvanized steel end caps come standard, both low-rise and high-rise styles, but an upgrade to aluminum easy-off caps offers easier installation and removal. These anchor with over-center clamps inside the truck box. Standard aluminum caps are also available.

The standard crank arm mounts vertically across the back of the box and gives four-position length adjustment. The U-joint has a 21-tooth splined key to adjust the tarp tension every 17 degrees. Upgrading to the Shur-Flex™ crank provides the flexibility to accommodate cargo doors or grain gates. It folds at the knuckle and secures to the side of the box with offset retainers. The standard stretch cord return guides the roll tube over the end cap, with a protective cover to reduce rope fraying. An upgrade to the patented Shur-Return™ features a heavy-duty steel tension spring. 1/4-inch non-stretch solid braid rope and lifetime warranty.

Key Features of this system include an aluminum latch plate, which is a lighter weight version of the galvanized latch plate, for a more professional appearance. The roll pipes are built from ¼’’heavy wall 2” aluminum. Easy-off tarp stops permit fast, easy tarp removal with minimal tools. The system is self cleaning, preventing grain buildup. Galvanized Bows and brackets allow the bow flex to allow for box expansion. Aluminum end caps provide a more attractive match for aluminum trailers.

1” ridge straps with ratchets and stretch-resistant webbing prevents tarp sag between bows. Stretch cord returns help guide the front of the roll tube across the end cap, and a protective cover reduces fraying. A standard crank arm with an 80 inch extension provides four-position length adjustments, and the crank mounts horizontally or vertically. A pinless crank retainer with a 7 inch standoff secures the crank arm to the trailer without pins or cables, making it safe and easy to use. 18 or 20 ounce vinyl tarp material with heat welded seams provide an added moisture barrier. Built in UV inhibitors resist colour fading.

Gravity box roll tarp kits

Free quote on a complete gravity box roll tarp kit, with any of the following specifications:

18 or 22 oz reinforced tarp material – any colour
Powder painted steel
Self locking/bungee return system
Ratchet straps
Stainless steel available
Self Locking Crank System

The Self Locking crank system is used on all gravity box, roll off, tender / spreader and grain buggy Roll Tarp kits.The handle fits neatly and securely into the cradle, after use.