250results about "Snow traps" patented technology

One illustrative embodiment of a tile & support structure may be configured to secure the position of a tile in a generally vertical configuration, such as the riser of a step, as a border around a portion of a deck, a building and / or wall façade, ventilated façade, interior or exterior wall covering, or other generally vertical surface. The support structure may be formed with a spine having at least one rail extending outward from a distal end thereof. The spine and rail(s) may be configured to secure one or more tiles, which tiles may be formed with a groove on at least one edge thereof, and wherein one or more rails may be positioned within the groove.

The invention is a temporary flashing for plumbing pipes extending through a flat roof. The flashing provides an inexpensive plumber supplied seal that can be installed and left in place under a permanent roof flashing provided by a roofer at a later time. The flashing comprises a plastic core base and a plastic core sleeve as one or two pieces. The base and the sleeve are overmolded with a flexible rubber.

The present invention is a modular triangular rail system comprising a triangular rail structure with stands, end caps, and extender joints, made from a proprietary material. The present invention allows for adjustable configurations to fit various roof sizes and snow load requirements, effectively preventing snow and ice from sliding off rooftops. Each stand features a 2-inch high barrier to prevent ice build-up and sliding.

The utility model relates to an anti-ice-falling device for the surface of a cross tie beam of a bridge tower, which comprises a plurality of anti-ice-falling devices arranged on the surface of the cross tie beam, each anti-ice-falling device comprises an anti-ice-falling clamp, a plurality of raised fixing pieces and a plurality of extended connecting pieces, and the anti-ice-falling clamps comprise a first anti-ice-falling clamp and a second anti-ice-falling clamp. The first anti-ice-falling clamp and the second anti-ice-falling clamp are fixedly arranged on the edges of the left side and the right side of the cross tie beam respectively, and the first anti-ice-falling clamp and the second anti-ice-falling clamp are connected into a whole through the extending connecting pieces and the protruding fixing pieces and fixed to the upper surface of the cross tie beam. The limiting baffles arranged at certain intervals prevent solid accumulated ice from sliding on the upper surface of the bridge tower cross tie beam, meanwhile, lateral drainage of the upper surface of the cross tie beam cannot be hindered, the phenomenon that a traditional drainage channel becomes a'water blocking channel 'due to icing is avoided, and the size of a single block of ice accumulated on the upper surface of the cross tie beam is limited within a safety threshold value as much as possible.

The application discloses a waterproof structure of a roof pipeline, which comprises a roof concrete top plate, a pre-embedded protective pipe pre-embedded in the roof concrete top plate and a pipeline located on the inner side of the pre-embedded protective pipe. A micro-expansion fine stone concrete is arranged between the pipeline and the pre-embedded protective pipe. A leveling layer, a waterproof coiled material and a waterproof protective layer are sequentially arranged on the roof concrete top plate from bottom to top. The waterproof coiled material is wrapped on the outer side of the pre-embedded protective pipe. A plugging cover is installed on the top of the pre-embedded protective pipe. A sealing ring is clamped between the plugging cover and the pre-embedded protective pipe. The inner ring of the sealing ring is sealed on the outer side of the pipeline. The plugging cover is installed on the outer side of the pipeline. The sealing ring clamped between the plugging cover and the pre-embedded protective pipe is arranged on the outer side of the pipeline. The inner diameter of the sealing ring is smaller than the outer diameter of the pipeline in a natural state. When the sealing ring is not glued, the middle part of the sealing ring is arranged to be bulged upward. When the pipeline is deformed, the bulged part can be used as compensation, so that the waterproof effect is ensured when thermal expansion and cold contraction occur.

A flue protector system and methods of manufacture can include: forming an attachment plate including a tab configured to fix the attachment plate to an upright column without the use of a tool; and forming a bumper extended from the attachment plate, the bumper defines a flue space extending to the upright column.

The invention discloses a parapet inner wall wallboard structure and a construction method thereof.The parapet inner wall wallboard structure comprises a composite base plate, a connecting layer and a flashing cover plate, the composite base plate comprises a heat preservation layer and a hydrophobic protection layer covering the outer side surface of the heat preservation layer, and the connecting layer is attached to the inner side and the bottom surface of the heat preservation layer; the flashing cover plate is used for being pasted to the root portion and the inner wall portion of the parapet wall and covers the top of the composite base plate, the flashing cover plate comprises a first extending end and a second extending end, the first extending end extends towards the inner side of the parapet wall and is provided with a fixing structure matched with a parapet wall pre-embedded mounting groove, and the first extending end covers the waterproof layer closing-in portion of the parapet wall in a pressing mode. And the second extending end is bent and extends downwards, and is pressed and attached to the outer surface of the hydrophobic protective layer, so that the technical problems that in the prior art, a parapet inner wall heat preservation waterproof structure is multiple in layer, complex in construction step and low in efficiency are solved.

The utility model relates to the technical field of steel structure installation, in particular to a connecting structure of a gable color plate parapet and a roof color plate, which comprises glass cotton, a gable color plate and a color plate flashing piece, the gable color plate is fixedly arranged on a wall surface purline, the glass cotton is arranged between the gable color plate and the wall surface purline, and the color plate flashing piece is arranged between the gable color plate and the wall surface purline. The color plate flashing piece is composed of vertical plates on the inner side, the outer side and an inclined plate in the middle, the inclined plate of the color plate flashing piece inclines downwards towards the roof color plate, the vertical plate on the inner side of the color plate flashing piece is inserted between the gable parapet color plate and the glass cotton, and the vertical plate on the outer side of the color plate flashing piece is in lap joint with the roof color plate in a sealing mode. A supporting assembly is arranged at the bottom of the color plate flashing piece. According to the connecting structure of the gable color plate parapet wall and the roof color plate, the heat preservation performance and the waterproof performance between the roof color plate and the gable color plate are effectively improved, the durability and the stability of a building structure are enhanced, and the problems existing in a node form of a traditional steel structure roof color plate and a gable color plate wall plate are solved.

The utility model discloses a building roof drain pipe and air duct integrated structure which comprises a roof and a roof waterproof layer, a separation rib structure penetrates through a mounting base structure and is communicated with a drain pipe, a water stop steel plate is pre-buried at the lower end of the mounting base structure, the water stop steel plate is located in the roof, and the water stop steel plate is connected with the roof through the roof waterproof layer. Through the effect of the installation base structure, the number of holes formed in the roof can be reduced, the leakage probability is reduced, the drainage pipe is prevented from being frozen in winter through waste heat of an air duct, the steel consumption is reduced by sharing a supporting and hanging frame, and the construction efficiency is improved through a modularized prefabricated base; the position, provided with the mounting base structure, of the roof is effectively waterproof, the cavity is divided into the air channel hole and the drainage channel hole through the separation rib structure, rainwater can be effectively prevented from entering the air channel through cooperation of the air channel and the bent pipe, and the smoke and air exhaust effect is guaranteed.

The utility model provides a kind of sandwich waterproof thermal insulation structure of outdoor stair, not only ensure the continuity of outdoor stair insulation layer and waterproof layer laying, effectively protect the working performance of structure layer, also improve construction efficiency, avoid the construction cycle extension problem possibly caused by complex due to height difference change. The leveling layer is fixed on the upper surface of roof panel, and the stair surface layer plate is fixed on the upper surface of stair tread plate;The waterproof layer and the insulation layer are arranged between the leveling layer and the stair tread plate, the waterproof layer is fixed on the upper surface of the leveling layer, the insulation layer is fixed on the upper surface of the waterproof layer, and the stair tread plate is fixed on the upper surface of the insulation layer;It further includes vertical planting, vertical planting is sequentially implanted roof panel, leveling layer, waterproof layer, insulation layer and stair tread plate;Longitudinal reinforcement is embedded in the insulation layer, and the longitudinal reinforcement is fixed with the vertical planting in the insulation layer;Bidirectional steel mesh is embedded in the stair tread plate, and the bidirectional steel mesh is fixed with the vertical planting in the stair tread plate.

The utility model relates to a kind of steel stand column extends roof waterproof node structure, including roof main body, steel stand column, the top of steel stand column extends to the above of roof main body, a circle of reverse ridge guide wall is arranged around steel stand column on roof main body, a circle of eaves is arranged on the top of reverse ridge guide wall, water layer is installed at the internal corner between roof main body and reverse ridge guide wall, roof waterproof heat-insulating composite layer is arranged on the horizontal portion of water layer and roof main body, large R angle waterproof protective layer is arranged between the vertical portion of water layer and roof waterproof heat-insulating composite layer, stainless steel water-shedding plate, which is covered above eaves, is welded on steel stand column.Affirmative effect is: by setting a circle of reverse ridge guide wall extending upwards, a circle of eaves is set on the top of reverse ridge guide wall and protrudes outward, water layer is installed at the internal corner between roof main body and reverse ridge guide wall, roof waterproof heat-insulating composite layer is arranged on the horizontal portion of water layer and roof main body, form multiple waterproof structures, improve waterproof effect.

The utility model relates to the technical field of house waterproof equipment, and discloses a steel structure roof waterproof joint sealing treatment mold which comprises a roof, a mold closing mechanism is arranged above the roof, a steel structure column pier is arranged at the top of the roof, a functional box is arranged above the roof, a motor is fixedly installed on the inner wall of the top of the functional box, and a bidirectional mechanism is arranged in the functional box. Two seat holes are formed in the bottom of the functional box, a lifting mechanism is arranged at the bottom of the functional box, a handle is arranged at the top of the functional box, an electric push rod is arranged above the roof, and the top end of an output shaft of the electric push rod is fixedly connected with the bottom of the functional box. Compared with the prior art, the sealing device has the following advantages and effects that by arranging the mold closing mechanism, the two sealing mold bases can be close to each other for mold closing, the sealing glue cavity can be formed through the two sealing glue grooves, and sealing treatment can be conducted on waterproof joints on the periphery of the steel structure column pier by injecting sealing glue into the sealing glue cavity.

The fall protection device for roofs, in particular for the sides of pitched roofs, especially on gable ends or verges, is characterized in that the fall protection device comprises a handrail (1), a knee rail (2), a toe rail (9), a railing which includes a first post (10) and a second post (11), and, in particular, four roof hooks, wherein the fall protection device can be attached to roof battens and / or rafters and preferably to roof tiles with the roof hooks, in particular by clamping. Figure 1 is proposed as a drawing for the summary.

The utility model discloses a metal roofing board end welding flashing plug node which comprises metal roofing boards and a flashing board, protruding board ribs are arranged at the connecting positions of adjacent metal roofing boards, the flashing board is connected with the metal roofing boards, the flashing board is provided with a horizontal board and a flange or a cylinder body extending upwards, and the flange or the cylinder body is connected with the metal roofing boards. The metal roofing board is connected with the outer edge of the universal horizontal board, the metal roofing board is arranged above the universal horizontal board, and the board rib is provided with a covering type plug at the joint of the metal roofing board and the universal horizontal board. The joint of the metal roof panel and the universal horizontal plate, the joint of the plate rib and the universal horizontal plate, and the joint of the covering type plug and the plate rib as well as the joint of the covering type plug and the universal horizontal plate are all in sealed continuous welding seam connection. Reliability and safety of the metal roof can be improved, daily maintenance of a roof system can be reduced, operation and maintenance cost of a building is reduced, influence on use of the building is reduced, and economic benefits are high.

The utility model relates to a stepped parapet wall with a buffering green plant planting structure, and relates to the field of parapet walls. The roof comprises a roof plate and a parapet wall arranged on the upper end face of the roof plate, a waterproof layer is laid on the upper end face of the roof plate, a step buffering table is arranged between the waterproof layer and the parapet wall, a triangular net rack is installed on the outer side face of the step buffering table, and the bottom face of the triangular net rack is attached to the waterproof layer. And the vertical edge of the triangular net rack is attached and fixed to the step buffer table. According to the roof structure, the step buffer table is arranged between the traditional roof plate and the parapet wall, the impact of rainwater is reduced through the step buffer table, through the synergistic effect of all the components, the good buffer performance is achieved, the waterproof layer can be effectively protected, and damage of rainwater to the roof structure is reduced. And meanwhile, a water source on the roof can be better discharged and utilized through the stepped buffer table.

The utility model discloses a telescopic snow removing mechanism on the top of a greenhouse, and relates to the technical field of snow removing mechanisms. The telescopic snow removing mechanism at the top of the greenhouse comprises dual-purpose rails fixedly connected to the two ends of a greenhouse body, a first sliding block and a second sliding block are connected to the dual-purpose rails in a sliding mode, a scrubbing brush is arranged between the first sliding block and the second sliding block, and an adjusting unit is arranged on the dual-purpose rails. According to the telescopic snow removing mechanism for the greenhouse top, the adjusting unit is adopted to drive the scrubbing brush to move along the track of the dual-purpose track, the scrubbing brush abuts against the greenhouse roof so that accumulated snow on the greenhouse roof can be cleaned on the premise that the greenhouse structure is not damaged, and the telescopic unit conveniently drives the vibration motor to stretch out and draw back on the greenhouse roof and cooperates with the adjusting unit; the vibration motor can conveniently reach all positions of the shed roof, the plastic film has certain elasticity, and the vibration motor abuts against the plastic film.

The utility model relates to the technical field of machine rooms, and discloses a machine room capable of isolating noise, which comprises a machine room body, a ventilation box is fixedly arranged in the middle of the upper end of the machine room body through bolts, and a smoke removal box mechanism is fixedly arranged on the rear side of the upper end of the machine room body through bolts. A protection box is fixedly arranged on the front side of the upper end of the machine room body through bolts, the smoke removal box mechanism comprises a fixing box, two smoke suction fans are fixedly arranged on the inner bottom face of the fixing box through bolts, smoke exhaust pipes are fixedly arranged at the output ends of the two smoke suction fans through bolts, and the machine room body comprises a glass wool board. And a wave crest sound absorption sponge is fixedly arranged on one side of the glass wool board. According to the machine room, the machine room body is composed of various materials such as the polyester fiber sound absorption boards, the rock wool boards, the glass wool boards, the wave crest sound absorption sponge and the sound insulation felt, the advantages of the materials in the aspects of sound absorption, heat insulation, fire prevention, moisture prevention and the like are complementary, and an efficient sound insulation structure is formed.

The utility model relates to an assembly type footpath system which comprises a metal footpath, a purline and a base, the metal footpath is in a double-inverted-U shape, the purline is in a U shape, the base is in an inverted U shape, the metal footpath is installed on the purline through bolts, the purline is installed on the base through bolts, and the metal footpath is installed on the base through bolts. The base is installed on an arch of the metal roof through bolts, the installation direction of the metal footpath is parallel to or perpendicular to the arch, the installation direction of the purline is perpendicular to the metal footpath, the installation direction of the purline is perpendicular to or parallel to the base, and the installation direction of the base is parallel to the arch. Compared with the prior art, materials are saved, meanwhile, the connection strength between components is high, and the strength of the metal roof is high when the metal roof is installed.

The utility model discloses a kind of existing metal roof additional fixed parts and additional BIPV system thereof, additional fixed part is the keel structure with hollow cavity being arranged along the length direction of lock seam of metal roof, upper and lower ends are respectively provided with upper support plane and lower support plane, lower support plane is equipped with the opening being set through length, the height of hollow cavity of additional fixed part is greater than the height of lock seam, the width of opening is greater than the width size of lock seam, the width of lower support plane of additional fixed part is compatible with the width of roof rib edge support plane on both sides of lock seam of metal roof;Lock seam of metal roof is extended to the hollow cavity of additional fixed part by the opening of additional fixed part, additional fixed part is fixed on roof rib edge support plane, and the upper support plane of additional fixed part and the lower end surface of photovoltaic module are fixed by structure glue bonding. The utility model can be quickly installed on existing metal roof, match various types metal roof panel type, assembly installation step is simple, can greatly improve installation efficiency and paving area.

The invention relates to the technical field of seedling growing greenhouses, in particular to a plant protection seedling growing greenhouse which comprises a main frame, a protection assembly is movably mounted on the outer side of the main frame and comprises a first side frame, a second side frame and two side plates, and the first side frame and the second side frame are slidably mounted on the outer side of the main frame; sliding rails are integrally formed on the two sides of the top of the main frame. Through the design that the upper half portions of the first side frame and the second side frame are arc-shaped and the lower half portions of the first side frame and the second side frame are planes, the arc sections are always attached to the upper portion of the main frame, the stability and the sealing performance of structural movement are ensured, the planes have the rainproof performance and the heat preservation performance, and the adaptability and the reliability of equipment under different weather conditions are improved; through the arrangement of the main frame, external airflow forms a stable circulation path in the main frame, airflow uniformity and heat exchange efficiency in the main frame are improved, impact of direct blowing of external low-temperature airflow on seedlings is effectively reduced, and seedling growth stability and seedling survival rate are improved.

The utility model belongs to the technical field of building structures, and particularly relates to a roof connecting assembly, a roof mounting device and a roof system.The roof connecting assembly is used for connecting a main body structure and roof additional equipment and comprises a plurality of support bodies, and the support bodies penetrate through a roof waterproof layer of a roof structure and are connected with the main body structure and the roof additional equipment; waterproof layer clamping parts are formed between the support bodies connected with the main body structure and the mounting base, waterproof layer clamping parts are formed between the adjacent support bodies, each waterproof layer clamping part correspondingly clamps one roof waterproof layer, and the support bodies seal the penetrating holes in the roof waterproof layers, so that the roof waterproof layers do not need to be turned up and closed up, and the roof waterproof layers are not prone to being damaged. Therefore, the construction difficulty of overlapping construction of the multiple waterproof layers of the roof structure provided with the roof additional equipment is reduced, and the working efficiency is improved.

The utility model discloses a waterproof joint for a latticed column to go out of a basement top plate opening. The waterproof joint comprises a basement top plate, a water stop steel plate and a waterproof ridge. Reserved holes are formed in the positions, crossed with the latticed columns, of the basement top plate; the water-stop steel plate is horizontally arranged, one end of the water-stop steel plate is poured in concrete of the basement roof, a cantilever at the other end of the water-stop steel plate is arranged in the reserved hole, and the water-stop steel plate is annularly arranged around the reserved hole; the waterproof ridge comprises four vertical steel plates, the vertical steel plates are sequentially welded to form a rectangular frame with the periphery closed, the bottoms of the vertical steel plates are fixedly welded to the middles of the water stop steel plates, the height of the tops of the vertical steel plates is larger than that of the upper surface of the basement top plate, and the height difference meets a preset value. The waterproof joint can prevent accumulated water above the top plate of the basement from being poured into the basement through the reserved hole and can also prevent the accumulated water from permeating into the basement from the position between the waterproof ridge and concrete, and the waterproof joint has the advantages of being good in waterproof effect, simple in structure and low in cost.

The application discloses a snow blocking device assembly and a snow blocking system for a shed roof, and strengthens the stress capacity of the snow blocking device assembly and the roof. The snow blocking device assembly comprises a snow blocking piece, two reinforced purlins, at least two mounting bases and at least one anti-instability purlin, the at least two mounting bases are provided with mounting holes and are arranged at intervals along the axial direction of the snow blocking piece; the two reinforced purlins are arranged at intervals along a first direction perpendicular to the axial direction of the snow blocking piece and are used for being connected with the body structure of a building; the at least one anti-instability purlin is arranged between the two reinforced purlins and connects the two reinforced purlins; wherein the snow blocking piece is arranged in the mounting hole and is connected with the at least two mounting bases arranged at intervals; the mounting bases and the two reinforced purlins are connected and are connected to the shed roof of the building body, the mounting bases and the reinforced purlins are distributed on the inner side and the outer side of the shed roof, and the shed roof structure is ensured not to be damaged by snow during snow melting and the safety of people and objects on the ground is ensured when snow falls.

The utility model relates to the technical field of vegetable greenhouses, in particular to a cucumber greenhouse with a light-transmitting sunshade double-layer film, which comprises a film greenhouse body supported by a structure formed by fixing a plurality of arc-shaped greenhouse frame rods and a plurality of connecting rods in a staggered manner, and a plurality of sunshade films, a plurality of vertical rods and a film surface slapping mechanism are arranged in the film greenhouse body. The film surface slapping mechanism is used for slapping the inner side surface of the film shed body and comprises a long shaft, a plurality of shifting rods, a fixing rod and a slapping plate. According to the cucumber greenhouse with the light-transmitting and sun-shading double-layer film, the film surface slapping mechanism is arranged, the film surface slapping mechanism slaps the film greenhouse body in a mechanical slapping mode during working, the film greenhouse body is slapped and vibrated, water drops on the inner surface of the greenhouse film are removed, pulling of the water drops to the greenhouse film is relieved, and meanwhile in snowy weather, the water drops on the inner surface of the greenhouse film are prevented from falling off. Accumulated snow on the top of the greenhouse can be shaken off in time, the pressure of the accumulated snow on the greenhouse is reduced, and the structural stability and use safety of the greenhouse are guaranteed.

This invention relates to the field of prefabricated building technology, and more particularly to a prefabricated light steel farmhouse, comprising a light steel farmhouse body, which includes walls and two roof surfaces fixed to the upper part of the walls, both of which are sloping. The light steel farmhouse body also includes an installation plate, a cover plate, a counterweight mechanism, a vibration mechanism that causes the installation plate to vibrate intermittently in its sliding direction, and a triggering mechanism connected between the vibration mechanism and a limiting mechanism. Through the vibration mechanism, in typical light snowfall, snowflakes, after being heated by a periodic heating plate, automatically slide down and land on a receiving plate. This causes the receiving plate to slide down and pulls the installation plate downwards via a rope. After the snowflakes land above the receiving plate, they are bounced off by the vibration plate. Under the elastic force of a first spring, the installation plate quickly moves upwards, producing a vibration effect, thereby automatically shaking off the snow accumulated on the photovoltaic panel.

The invention relates to the technical field of bus shelter, in particular to a bus shelter which comprises a shelter body, a fixed shielding plate is mounted at the top end of the shelter body, the bus shelter further comprises a movable shielding plate, one end of the movable shielding plate is hinged to the upper end face of the fixed shielding plate, and the inclination angle of the movable shielding plate is adjustable; the inclination adjusting part is connected to the movable shielding plate and used for adjusting the inclination angle of the movable shielding plate; the snow guide plate is arranged on one side of the kiosk body in a liftable mode and located below the lower end of the movable shielding plate; through cooperation of the movable shielding plate and the inclination adjusting part, the inclination angle of the shielding plate can be flexibly adjusted, accumulated snow can be rapidly guided to slide down, the situation that the accumulated snow accumulates to cause load pressure to the pavilion body structure is avoided, then the synchronous snow melting part releases snow melting saline water during snow removal, the adhesion force between the accumulated snow and the shielding plate is effectively reduced, and the snow removal efficiency is further improved; automatic snow cleaning can be completed without manual intervention, and the labor cost and the operation risk are reduced.

This utility model discloses an arched corrugated steel roof, including a roof body, perforated water spray pipes, multiple pipe clamp supports, and multiple heat-conducting pipes for heating. The multiple pipe clamp supports, heat-conducting pipes, and perforated water spray pipes are evenly spaced on the upper surface of the roof body. The heat-conducting pipes and perforated water spray pipes are fixed to the roof body via the pipe clamp supports. The heat-conducting pipes are electrically connected to the photovoltaic modules. By using heat-conducting pipes at the upper end of the roof for snow removal and heating, snow removal does not require the use of environmentally friendly de-icing agents, making operation convenient, cost-effective, and with minimal safety hazards. Furthermore, water is sprayed through the perforated water spray pipes to reach the roof surface, achieving roof cooling and reducing indoor temperature, thus realizing intelligent indoor cooling for the arched corrugated steel roof building.

The utility model relates to a large-scale accessible pitched roof structure based on dot-matrix ridge grids. The large-scale accessible pitched roof structure comprises a roof main body structure (1), the ridge main body structure (2) is formed by arranging a plurality of ridge supporting frameworks (21) on the roof main body structure (1) in a dot-matrix mode so as to disperse roof loads, and orderly drainage channels are formed in dot-matrix staggered gaps; the waterproof and moisture-proof structure (3) is laid on the ridge main body structure (2) so as to form a multi-layer waterproof and moisture-proof barrier and provide anti-sliding anchoring for the upper layer; and the people getting-on stone step platform (4) is laid on the waterproof and moisture-proof structure (3), serves as a space utilization core and provides a safe and stable people getting-on activity area. The stability of connection with the roof main body structure (1) is improved by arranging the ridge supporting framework, the orderly drainage of the inside and the outside is ensured by arranging the waterproof and moisture-proof structure (3), and the utilization rate of the roof is increased by arranging the man-stone step platform (4).

A snow rake device comprises an open shape rake head operatively coupled to a gear assembly, handle assembly, and motor. The motor drives a flex shaft to rotate, which is pinioned into a linear reciprocating motion by the gear assembly, causing the rake head to move in opposite distal and proximal directions. Cutting bars on the rake head may then break up compacted snow and ice to more efficiently clear a building roof from snow.