From across a courtyard, a pergola’s posts and outer beams define its outline. From a table underneath, the lattice attachments and beam ends come into view. Both perspectives matter when an architect or designer is working through the appearance of a restaurant patio, apartment common area or private terrace.
4KLA supplies 4K Aluminum systems for commercial and residential projects. Beyond the roof style and color, the framing has several details worth understanding: the shape of each member, how the lattice attaches, and how connections and exposed ends are finished.
Posts, beams and lattice have different visual roles
Posts are the vertical supports. Beams form the main horizontal framing. Lattice members create the repeated slats of an open roof. Their size and arrangement affect how much of the structure someone sees from the entrance, beneath the roof or through an adjacent window.
The manufacturer’s FAQ lists 4-by-4, 6-by-6 and 8-by-8-inch posts, with beam profiles ranging from 2-by-4 to 2-by-10 inches. These are published product options, not a sizing recommendation for a particular project.
A deeper perimeter beam presents a wider band when viewed from the side. The repeating lattice creates a finer pattern overhead. A side elevation and an underside view show different parts of that composition, even when the whole frame uses one finish color.
This is useful context for a contractor discussing a design with an architect or owner. “Aluminum pergola” describes the general product, while the selected profiles give a clearer picture of its proportions. The same distinction helps an owner compare photographs without needing to interpret structural calculations.
Concealed lattice attachments reduce visible hardware
4K Aluminum’s pergola specifications describe internally attached, hidden, color-matched screws for the lattice. That is a specific attachment feature; it should not be read as a promise that every fastener on every completed configuration will be invisible.
The visual difference is easiest to understand from below. With an open lattice roof, people can see the underside of the slats and the places where they meet the framing. A concealed attachment keeps the screw head from becoming another repeated element in that view.
Color matching addresses a different detail: the contrast between hardware and the surrounding finish. Concealment describes where the attachment sits. They contribute to the same finished appearance, but the terms mean different things.
Beam connectors and end caps do different jobs
A connector joins framing members. An end cap finishes the exposed end of a member. These details can be close together in a photograph, which makes them easy to confuse.
The manufacturer describes its beam connectors as seamless. For a designer, the relevant view is the meeting point between members: the beam faces, their alignment and the hardware visible around the joint. The selected system and project drawings determine the connection arrangement.
4KLA also identifies extruded end caps, and the manufacturer’s pergola page specifies that the system does not use plastic end caps. Along an exposed roof edge, the ends can repeat across the view. Their shape becomes part of the roof’s outline, particularly where lattice projects beyond the outer beam.
For design discussions, a close view of a beam junction answers a different question from a photograph of the perimeter ends. One shows how members meet; the other shows how the visible edge is finished. A wide courtyard photograph rarely explains both clearly.
Appearance and structural selection belong together
The posts, beams and trellises form a family of components, but the final combination depends on the project. Profile proportions and connection visibility are design considerations. Member sizes, supports, attachments and foundations also need to satisfy the applicable structural requirements. A photograph cannot establish those requirements or prove a permitted span.
4K Aluminum directs project-specific questions to its engineering resources. The approved design and current product instructions govern construction; concealed hardware alone says nothing about load capacity or installation time.
Discuss pergola framing with 4KLA
4KLA works with contractors, architects, designers and homeowners on product selection and supplies materials for qualified contractors to install.