Abstract: Method of sealing the gap between adjacent mats in a reusable load-supporting surface includes placing an elongated closed-cell compressible sponge rubber seal member along the edge of the first side of a first mat. The third side of a second mat is positioned adjacent to the first side of the first mat, wherein the main body of the seal member is sandwiched between the respective aligned edges of the adjacent mats. At least one locking pin hole of the second mat is aligned over a locking pin hole of the first mat and a locking pin is secured therein.

Abstract: Apparatus for forming a liquid-tight seal across a gap formed between adjacent, interconnected first and second mats in a load-supporting surface includes first and second liquid impermeable, elongated seal members extending into the gap from the first and second mats, respectively. The seal members abut one another in the gap to form a liquid tight seal therebetween.

Abstract: An adjustable locking pin useful for connecting at least first and second adjacent mats includes an elongated main body having a bore extending therethrough. An elongated rotor is configured to be disposed at least partially within the bore of the main body and extend downwardly therefrom. The rotor includes at least one foot disposed at its lower end and configured to releasably engage the second mat, The rotor is moveable relative to the main body to provide multiple locking positions of the locking pin relative to the first and second mats.

Abstract: Apparatus for forming a liquid-tight seal across gaps formed between adjacent components of a load-supporting surface useful at an outdoor worksite includes a liquid-impermeable, elongated, seal member configured to be sealing coupled to first and second mats in the load-supporting surface and extend across the gap formed therebetween.

Abstract: Apparatus for sealing the gap between adjacent interconnecting mats in a reusable load-supporting surface deployed on the ground includes a seal member. The seal member includes an elongated main body and an elongated planar tail extending outwardly therefrom. The main body is positionable in the gap and the tail is configured to extend into at least a portion of the interface formed between upper and lower lips of the adjacent mats.

Abstract: System for preventing the leakage of liquid from an outdoor work-site around the perimeter of the work-site includes a reusable load-supporting surface having at least two interconnected adjacent mats and a plurality of berm members configured to be disposed around the perimeter thereof.

Abstract: An adjustable locking pin for connecting at least first and second overlapping mats includes an elongated main body, an elastomeric seal extending around the periphery of an enlarged head of the main body and an elongated rotor threadably engaged in a bore of the main body. The rotor is rotatable through at least two 360 degree revolutions of rotation relative to the main body and includes a foot at its bottom end. The rotational adjustability of the rotor allows the first and second mats to be tightly held together.

Abstract: System for containing liquid introduced onto a reusable load-supporting surface includes a plurality of interconnectable berm members configured to releasably sealingly engage the load-supporting surface to prevent leakage of liquid from the load-supporting surface around its perimeter.

Abstract: Apparatus useful for providing a liquid-tight seal around an opening formed in the earth's surface of an underground borehole includes a clamp and at least one platform. The clamp is configured to engage a wall extending around the borehole and the platform is configured to extend outwardly from the clamp over the earth's surface adjacent to the borehole.

Abstract: Apparatus for electrically connecting and grounding at least two mechanically interconnectable, planar mats in a reusable load-supporting surface includes at least one removable, electrically-conductive cover configured to be engaged with each mat and extend at least partially across the top and/or bottom face thereof. Each cover includes at least one conductive interface configured to electrically connect its associated mat with at least one other mat in the load-supporting surface.

Abstract: Apparatus for providing illumination from a support surface includes a shell releasably engageable with the support surface. An electronics system is seated within the shell and projects light up and out of the shell. A power pack releasably engages the shell and electrically engages the electronics system to provide power thereto. The electrical interface between the electronics system and power pack is fluidly sealed.

Abstract: System for containing liquid introduced onto a reusable load-supporting surface includes a plurality of interconnectable berm members configured to releasably sealingly engage the load-supporting surface to prevent leakage of liquid from the load-supporting surface around its perimeter without the use of any liners beneath the load-supporting surface.

Abstract: An adjustable locking pin for connecting at least first and second overlapping mats includes an elongated main body, an elastomeric seal extending around the periphery of an enlarged head of the main body and an elongated rotor threadably engaged in a bore of the main body. The rotor is rotatable through at least two 360 degree revolutions of rotation relative to the main body and includes a foot at its bottom end. The rotational adjustability of the rotor allows the first and second mats to be tightly held together.

Abstract: Apparatus for sealing the gap between adjacent interconnecting mats in a reusable load-supporting surface deployed on the ground includes a seal member. The seal member includes an elongated main body and an elongated planar tail extending outwardly therefrom. The main body is positionable in the gap and the tail is configured to extend into at least a portion of the interface formed between upper and lower lips of the adjacent mats.