Guardrail System
A guardrail support comprising a base having a first side with attachment holes suitable for attachment to a surface beneath the base using one or more fasteners at a penetrating angle, and a second side one or more attachment holes suitable for attachment to the surface beneath the base using one or more fasteners at a penetrating angle, a post extending vertically from the base, a support member extending at an angle from the first side of the base to the post, where an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base, and wherein when the base of the guardrail support is attached to the surface beneath the base, the guardrail support will withstand a 200 pound outward or downward force applied to the upper portion of the post.
The present invention generally relates to a guardrail system and components thereof used during construction projects. For example, when a high rise building is erected, it is important that the safety of the construction workers is provided for. A guardrail system serves to protect the construction workers from falling from a building under construction, or provide “fall protection.” The guardrail system may also serve to prevent any construction materials from falling from the worksite and damaging or injuring workers or equipment located on the ground below. In the United States, the Occupational Safety & Health Administration (“OSHA”) has promulgated Safety and Health Regulations for Construction at 37 C.F.R. §1926 that include regulations directed to fall protection. In particular, 37 C.F.R. §1926.502(b)(1) requires that a top edge height of top rails, or equivalent guardrail system members used for fall protection, shall be 42 inches (1.1 m) plus or minus 3 inches (8 cm) above the walking/working level. Thus, the OSHA regulations require that the guardrail system must have a nominal top rail height of 42 inches above the walking/working level.
In addition to the 42-inch height requirement, the OSHA regulations also require that the guardrail system is sufficiently strong and capable of withstanding a certain force applied to the top rail of the guardrail system. In particular, 37 C.F.R. §1926.502(b)(3) requires that guardrail systems shall be capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied within 2 inches (5.1 cm) of the top edge, in any outward or downward direction, at any point along the top edge.
As a result of these applicable OSHA regulations, a number of different guardrail systems having a height of 42 inches have been designed that are capable of withstanding a force of at least 200 pounds applied within 2 inches of the top edge, in any outward or downward direction. However, in certain applications and construction projects, it may be desirable to provide fall protection above and beyond that mandated by the OSHA regulations. For example, it may be desirable to provide a guardrail system that has a height greater than 42 inches to provide even greater fall protection safety to construction workers. Thus, some construction projects may request or specify that the height of the guardrail systems are as high as 60 inches to provide even greater fall protection for the construction project.
Pursuant to OSHA regulations, a guardrail system may exceed 42 inches in height, but must comply with the OSHA regulations pertaining to guardrail systems used for fall protection. In particular, 37 C.F.R. §1926.502(b)(1) provides that when conditions warrant, the height of the top edge may exceed the 45-inch height limitation (42 inches+3 inches), provided the guardrail system meets all other criteria within the paragraph. Therefore, a guardrail system having a height of 60 inches must still meet the criteria of 37 C.F.R. §1926.502(b)(3), that requires that guardrail systems shall be capable of withstanding, without failure, a force of at least 200 pounds (890 N) applied within 2 inches (5.1 cm) of the top edge, in any outward or downward direction, at any point along the top edge. Existing guardrail systems having a 42-inch height do not meet these requirements. In view of the foregoing, there is a need to provide a guardrail system having a top rail height up to 60 inches that is OSHA compliant and thus capable of withstanding a force of at least 200 pounds applied within 2 inches of the top edge of the guardrail system in any outward or downward direction at any point along the top edge.
SUMMARYThe present embodiments disclose a guardrail support comprising a base having a first side that includes a first set of one or more attachment holes suitable for attaching the first side of the base to a surface beneath the base, and a second side opposite the first side having a second set of one or more attachment holes suitable for attaching the second side of the base to the surface beneath the base; a post extending vertically from the base; a support member extending at an angle from the first side of the base to the post; wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base; and wherein when the base of the guardrail support is attached to the surface beneath the base, the guardrail support will withstand a 200 pound force applied to the upper portion of the post in a direction perpendicular to the post and in a direction from the second side of the base to the first side of the base.
Further embodiments include a guardrail support comprising a base having a first side that includes a first set of one or more attachment holes suitable for attaching the first side of the base to a surface beneath the base by inserting one or more fasteners through the first set of attachment holes at a penetrating angle, and a second side opposite the first side having a second set of one or more attachment holes suitable for attaching the second side of the base to the surface beneath the base by inserting one or more fasteners through the second set of attachment holes at a penetrating angle; a post extending vertically from the base; a support member extending at an angle from the first side of the base to the post; wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base.
Example embodiments also disclose a guardrail system comprising a first guardrail support comprising a base having a first side that includes a first set of one or more attachment holes and a second side opposite the first side having a second set of one or more attachment holes; a post extending vertically from the base; and a support member extending at an angle from the first side of the base to the post; wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base; and wherein the base is attached to a surface beneath the base by one or more fasteners inserted through one or more of the first set of one or more attachment holes on the first side of the base at a penetrating angle, and one or more fasteners inserted through the second set of attachment holes on the second side of the base at a penetrating angle; a second guardrail support comprising a base having a first side that includes a first set of one or more attachment holes and a second side opposite the first side having a second set of one or more attachment holes; a post extending vertically from the base; and a support member extending at an angle from the first side of the base to the post; wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base; and wherein the base is attached to a surface beneath the base by one or more fasteners inserted through one or more of the first set of one or more attachment holes on the first side of the base at a penetrating angle, and one or more fasteners inserted through the second set of attachment holes on the second side of the base at a penetrating angle; and a span of fence extending from the first guardrail support to the second guardrail support and retained by the first guardrail support and the second guardrail support wherein a top rail of the span of fence is between 48 and at least 60 inches above the base.
Exemplary embodiments are described herein with reference to the drawings, wherein like parts are designated by like reference numerals, and wherein:
In addition, in a preferred embodiment the line of attachment holes 20a, 20b, 20c, and 20d are spaced apart from the line of attachment holes 22a, 22b, 22c, and 22d by 14 19/32 inches. However, the attachment holes do not need to be spaced in a line. Furthermore, in a preferred embodiment, the distance from the front edge of vertical post 50 to the end of the first side of base 14 is 9 inches and the distance from the center of the post 50 to the end of the second side of the base 16 is 6¼ inches. In addition, in a preferred embodiment the post 50 is a 1½ inch by 1½ square tube. Preferably, the post 50 has a wall thickness of ⅛″ and is comprised of ASTM 513 Grade 1010 steel. It will be appreciated by those of skill in the art that other suitable materials for the post 50 could also be used provided that the requirement that the post will withstand a 200 pound outward force applied at a distance D above the base of 48, 54, and/or 60 inches depending on the desired guardrail height. In addition, the post could have a cross section that is round, rectangular, or have some other cross-sectional geometry. Furthermore, as used herein the term vertical post or extending vertically, does not require that post extend from the base at exactly a 90 degree angle, and those terms shall be interpreted to cover a post extending 90 degrees from the base, plus or minus 30 degrees. Nonetheless, in a preferred embodiment, the post extends at a 90 degree angle from the base and has a length of 62 inches. Preferably, the post 50 is welded to the base 12.
The support member 40 shown in
In
In addition, a base 12 having a thickness of ¼ inch is also desirable because OSHA regulations require that a guardrail system include a toeboard that prevents nails and materials from falling from the worksite that must have a gap of no more than ¼ inch from the working surface to the bottom of the toeboard. In particular, 37 C.F.R. §1926.502(j)(3) specifies that toeboards shall have not more than ¼ inch (0.6 cm) clearance above the walking/working surface. As a result, with a base 12 of ¼ inch thick, a span of a fence may be placed atop the base 12 and the OSHA toeboard maximum clearance requirement for a toeboard may still be met.
On the first side 14 of base 12, a first set of attachment holes 24a, 24b, 24c, and 24d are positioned. This first set of attachment holes 24a, 24b, 24c, and 24d preferably have a diameter of 9/16 inches and correspond to attachment holes 20a, 20b, 20c, and 20d in the first angle member so that a fastener such as fastener 36 shown in
In a preferred embodiment, first angle member 30 is welded to the first side 14 of base 12 to provide a penetrating angle for fasteners such as fastener 36 to extend through the base 12 and into surface 18 beneath the base 12. Similarly, in a preferred embodiment second angle member 32 is welded to the second side 16 of base 12 to provide a penetrating angle for fasteners such as fastener 38 to extend through the base 12 and into surface 18 beneath the base 12. However, angle members 30 and 32 are preferred, but not required. For example, an angled surface could be formed directly into the first side 14 or second side 16 of base 12 through, for example, a milling operation, to provide an angled surface that provides a penetrating angle for the fasteners that are used. Alternately, the fasteners could be inserted at a penetrating angle without a permanent angled portion on the first and second sides 14, 16 of base 12 by, for example, providing removable tooling or a workpiece that allows fasteners to be inserted through the attachment holes on the first and second sides 14, 16 of base 12 at a desired penetrating angle. However, the use of first angle member 30 and second angle member 32 is preferred.
The rails and posts of the single span of a fence 90 and the double span of a fence 100 are preferably welded together and are preferably comprised of ¾ inch by ¾ inch steel tube having a wall thickness of ⅛ of an inch. The steel tube is preferably comprised of ASTM 513 steel. In addition, rails and posts could also have a different cross sectional geometry such as circular, rectangular, etc. provided they have the same strength as the preferred ¾ inch by ¾ inch steel tube described above. In addition, a toeboard may be positioned between rails 86 and 88 to meet OSHA's toeboard requirements.
A 200 pound outward load was applied by hanging a 200 pound load from a pulley attached to a fixed overhead anchorage point. The 200 pound load was applied to a single guardrail support having 2 fasteners in the first side 14 and 2 fasteners in the second side 16 of the base. The guardrail support 10 withstood the 200 pound outward force applied at a height of 60 inches above the base 12. The guardrail support 10 also withstood a 200 pound outward force applied at a height of 60 inches above the base 12 using 2 fasteners in the first side 14, and 3 fasteners in the second side 16, as well as when using 3 fasteners in the first side 14 and 2 fasteners in the second side 16.
Next, testing was performed on a guardrail system having a single span of fence retained between two guardrail supports 10 of the type shown in
The guardrail system with a single span of fencing also withstood a 200 pound outward force when using 2 fasteners in the first side 14 and 2 fasteners in the second side 16 of the base 12 of the guardrail supports 10. The guardrail system also withstood a 200 pound outward force applied at a height of 60 inches above the base 12 using 2 fasteners in the first side 14, and 3 fasteners in the second side 16, as well as when using 3 fasteners in the first side 14 and 2 fasteners in the second side 16 of the base 12 of the guardrail supports.
Further testing was performed on a guardrail system having a double span of fence as shown in
Additional testing was performed on a guardrail support attached to a concrete surface using fasteners comprising size 16d double head nails with tie wire. A 200 pound outward load was applied in the manner described above when the guardrail support was attached to plywood decking. The guardrail support 10 withstood a 200 pound outward force applied at a height of 60 inches above the base 12 where one fastener was inserted through the first side 14 of the base 12 of the guardrail support 10 and 2 fasteners were inserted through the second side 16 of the base 12 of the guardrail support 10. The guardrail support 10 also withstood a 200 pound outward force when using 2 fasteners in the first side 14 and 2 fasteners in the second side 16 of the base 12 of the guardrail support 10.
Thus, the guardrail support 10 shown in
Example embodiments of the present invention have been described above. Those skilled in the art will understand that changes and modifications may be made to the described embodiments without departing from the true scope and spirit of the present invention, which is defined by the claims.
Claims
1. A guardrail support comprising:
- a base having a first side that includes a first set of one or more attachment holes suitable for attaching the first side of the base to a surface beneath the base, and a second side opposite the first side having a second set of one or more attachment holes suitable for attaching the second side of the base to the surface beneath the base;
- a post extending vertically from the base;
- a support member extending at an angle from the first side of the base to the post;
- wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base;
- and wherein when the base of the guardrail support is attached to the surface beneath the base, the guardrail support will withstand a 200 pound force applied to the upper portion of the post in a direction perpendicular to the post and in a direction from the second side of the base to the first side of the base.
2. The guardrail support of claim 1, wherein the first set of one or more attachment holes on the first side of the base are adapted so that one or more fasteners may extend through the one or more attachment holes at a penetrating angle to attach the first side of the base to the surface beneath the base.
3. The guardrail support of claim 2, wherein the penetrating angle provides an angle of between 30 and 60 degrees between the one or more fasteners and the base.
4. The guardrail support of claim 3, wherein the penetrating angle provides an angle of 45 degrees between the one or more fasteners and the base.
5. The guardrail support of claim 2, wherein the second set of one or more attachment holes on the second side of the base are adapted so that one or more fasteners may extend through the second set of one or more at attachment holes at a penetrating angle to attach the second side of the base to the surface beneath the base.
6. The guardrail support of claim 5, wherein the penetrating angle provides an angle of between 30 and 60 degrees between the one or more fasteners extending through the second set of one or more attachment holes and the base.
7. The guardrail support of claim 6, wherein the penetrating angle provides an angle of 45 degrees between the one or more fasteners extending through the second set of one or more attachment holes and the base.
8. The guardrail support of claim 1, wherein a first angle member is positioned on the first side of the base having a third set of one or more attachment holes that correspond to the first set of attachment holes positioned on the first side of the base, and
- wherein the third set of attachment holes on the first angle member are positioned on a surface of the first angle member at an angle such that one or more fasteners may extend through the first set of attachment holes on the first side of the base and the third set of attachment holes on the first angle member at a penetrating angle of between 30 and 60 degrees from the base.
9. The guardrail support of claim 8, wherein the penetrating angle between the one or more fasteners and the base is 45 degrees from the base.
10. The guardrail support of claim 8, wherein a second angle member is positioned on the second side of the base having a fourth set of one or more attachment holes that correspond to the second set of attachment holes positioned on the second side of the base, and wherein the fourth set of attachment holes on the second angle member are positioned on a surface of the second angle member at an angle such that one or more fasteners may extend through the second set of one or more attachment holes on the second side of the base and the fourth set of attachment holes on the second angle member at an angle of between 30 and 60 degrees from the base.
11. The guardrail support of claim 10, wherein the angle between the one or more fasteners extending through the fourth set of one or more attachment holes on the second angle member and the base is 45 degrees from the base.
12. The guardrail support of claim 1, wherein when the base of the guardrail support is attached to the surface beneath the base, the guardrail support will withstand a 200 pound force applied to the upper portion of the post at a distance of 60 inches from the base in a direction perpendicular to the post and in a direction from the second side of the base to the first side of the base.
13. The guardrail support of claim 1, wherein the support member extends at an angle of between 30 and 60 degrees from the base.
14. The guardrail support of claim 13, wherein the support member extends at an angle of 45 degrees from the base.
15. The guardrail support of claim 1, wherein a first fence rail holder is positioned on the upper portion of the vertical post that is adapted to retain a top rail of a fence.
16. The guardrail support of claim 15, wherein the first fence rail holder is capable of withstanding a 200 pound downward force.
17. The guardrail support of claim 15, wherein the guardrail support will stand on its own before it is secured to a surface beneath the base.
18. A guardrail support comprising:
- a base having a first side that includes a first set of one or more attachment holes suitable for attaching the first side of the base to a surface beneath the base by inserting one or more fasteners through the first set of attachment holes at a penetrating angle, and a second side opposite the first side having a second set of one or more attachment holes suitable for attaching the second side of the base to the surface beneath the base by inserting one or more fasteners through the second set of attachment holes at a penetrating angle;
- a post extending vertically from the base;
- a support member extending at an angle from the first side of the base to the post;
- wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base.
19. The guardrail support of claim 18, wherein when the base of the guardrail support is attached to the surface beneath the base, the guardrail support will withstand a 200 pound force applied to the upper portion of the post in a direction perpendicular to the post and in a direction from the second side of the base to the first side of the base.
20. The guardrail support of claim 18, wherein one of the first set of one or more attachment holes on the first side of the base is positioned at least 14.5 inches from one of the second set of one or more attachment holes on the second side of the base.
21. The guardrail support of claim 20, where a second one of the first set of one or more attachment holes on the first side of the base is positioned at least 14.5 inches from one of the second set of one or more attachment holes on the second side of the base.
22. The guardrail support of claim 18, wherein the vertical post has a 1½ in×1½inch square cross section.
23. The guardrail support of claim 18, wherein the base is no more than 16 inches long and 8 inches wide and no more than one quarter of an inch thick.
24. The guardrail support of claim 20, wherein a first side of the vertical post is positioned at least 7 inches from one of the first set of attachment holes positioned on the first side of the base.
25. The guardrail support of claim 24, wherein a second side of the vertical post is positioned at least 4½ inches from one of the second set of attachment holes positioned on the second side of the base.
26. The guardrail support of claim 18, wherein the support member is attached to a first side of the post at a distance of 8½ inches from the base.
27. The guardrail support of claim 26, wherein the support member is comprised of an angle member having a length of 12 inches and two 1-inch long members having a thickness of ⅛ of an inch.
28. The guardrail support of claim 18, wherein a first fence rail holder is positioned on the upper portion of the vertical post and is adapted to retain a top rail of a fence.
29. The guardrail support of claim 28, wherein the first fence rail holder is capable of withstanding a 200 pound downward force.
30. The guardrail support of claim 28, wherein the first fence rail holder is formed from an angle member that extends 2¼ inches and is 1½ inch wide and ¼ inch thick.
31. The guardrail support of claim 28, wherein the first fence rail holder is positioned to retain a top rail of a fence 60 inches above the base.
32. The guardrail support of claim 28, wherein the fence rail holder has a hole positioned therein that is adjacent a hole positioned in the upper portion of the post and the hole on the fence rail holder and the post are adapted to receive a retention pin therethrough to retain a top rail of a fence.
33. A guardrail system comprising:
- a first guardrail support comprising:
- a base having a first side that includes a first set of one or more attachment holes and a second side opposite the first side having a second set of one or more attachment holes;
- a post extending vertically from the base; and
- a support member extending at an angle from the first side of the base to the post;
- wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base; and
- wherein the base is attached to a surface beneath the base by one or more fasteners inserted through one or more of the first set of one or more attachment holes on the first side of the base at a penetrating angle, and one or more fasteners inserted through one or more of the second set of attachment holes on the second side of the base at a penetrating angle;
- a second guardrail support comprising:
- a base having a first side that includes a first set of one or more attachment holes and a second side opposite the first side having a second set of one or more attachment holes;
- a post extending vertically from the base; and
- a support member extending at an angle from the first side of the base to the post;
- wherein an upper portion of the post is positioned at a distance of between 48 inches and 60 inches from the base; and
- wherein the base is attached to a surface beneath the base by one or more fasteners inserted through one or more of the first set of one or more attachment holes on the first side of the base at a penetrating angle, and one or more fasteners inserted through one or more of the second set of attachment holes on the second side of the base at a penetrating angle; and
- a span of fence extending from the first guardrail support to the second guardrail support and retained by the first guardrail support and the second guardrail support wherein a top rail of the span of fence is between 48 and at least 60 inches above the base.
34. The guardrail system of claim 33, wherein at least two of the second set of one or more attachment holes on the second side of the base have a fastener extending therethrough at a penetrating angle into the surface beneath the base and at least one of the first set of one or more attachment holes on the first side of the base have a fastener extending therethrough at a penetrating angle into the surface beneath the base.
35. The guardrail system of claim 34, wherein the at least two attachment holes on the second side of the base are positioned at least 14.5 inches from the at least one attachment hole positioned on the first side of the base.
36. The guardrail system of claim 34, wherein the guardrail system will withstand a 200 pound outward or downward force applied anywhere along the top rail.
37. The guardrail system of claim 36, wherein the vertical posts in the first and second guardrail supports have a 1½ in×1½ inch square cross section.
38. The guardrail system of claim 36, wherein the support member extends at a 45 degree angle from the base and is 12 inches in length.
39. The guardrail system of claim 36, wherein the vertical post in the first and second guardrail supports is positioned closer to the two attachment holes on the second side of the base than the one attachment hole on the first side of the base.
40. The guardrail system of claim 38, wherein the support member is comprised of an angle member having a length of 12 inches and two 1-inch long members having a thickness of ⅛ of an inch.
41. The guardrail system of claim 36, wherein the span of fence is positioned within a first fence rail holder located on the upper portion of the vertical post on the first guardrail support, and also positioned within a second fence rail holder that is located on the upper portion of the vertical post of the second guardrail support.
42. The guardrail system of claim 36, wherein the top rail of the fence is positioned 60 inches above the base.
43. The guardrail system of claim 36, wherein the top rail of the fence is comprised of ¾ inch by ¾ inch steel tube having a wall thickness of ⅛ of an inch.
44. The guardrail system of claim 43, wherein the span fence has a height of five feet and includes the top rail, a middle rail, and a bottom rail that are parallel to one another and attached to a first vertical member on a first side and a second vertical member on a second side.
45. The guardrail system of claim 36, wherein the fasteners are inserted into the surface beneath the base at a penetrating angle of 45 degrees from the base.
Type: Application
Filed: Mar 16, 2012
Publication Date: Sep 19, 2013
Applicant: ADJUSTABLE FORMS, INC. (Lombard, IL)
Inventor: Eric Lindquist (Elmhurst, IL)
Application Number: 13/423,026
International Classification: E04H 17/14 (20060101);