Single-leaf Torsion Bar Spring Mounted in Cover (Model Nos. M and RS)

• Unobstructed hatch opening
• Concealed torsion bar in cover assists operation
• Automatic hold-open arm
• Opens to full 90°
• Sizes 3' x 2-1/2' to 4' x 4'
• Steel and galvanized prime painted
• Supports 70 psf live load
• Cover has 1" of efficient insulation to provide U-value of .17 (Optional 2" insulation offers a "U" of .09)
• Zinc or cadmium plated hardware